https://www.explainxkcd.com/wiki/index.php?title=Talk:1522:_Astronomy&feed=atom&action=historyTalk:1522: Astronomy - Revision history2024-03-28T20:04:13ZRevision history for this page on the wikiMediaWiki 1.30.0https://www.explainxkcd.com/wiki/index.php?title=Talk:1522:_Astronomy&diff=192447&oldid=prevJohnHawkinson: What if they're just white paint on the ceiling?2020-05-25T00:13:54Z<p>What if they're just white paint on the ceiling?</p>
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<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>You're all forgotten how early astronomy was done.  At the turn of the century, photographs were taken through the telescope, developed, and only later analyzed closely - ''with a magnifying glass'' - as part of [http://www.astro.virginia.edu/~rjp0i/museum/photography.html Astrophotography]!  This allowed for careful tracking and analysis of the many stars that might be visible from just one frame.  (It also allowed observation of the same area of the sky at different days, or even at different years, to see which stars were moving relative to others.)  For more, look into [http://www.smithsonianmag.com/history/the-women-who-mapped-the-universe-and-still-couldnt-get-any-respect-9287444/?no-ist The Women Who Mapped the Universe] [[User:Jorgbrown|Jorgbrown]] ([[User talk:Jorgbrown|talk]]) 20:08, 11 May 2015 (UTC)</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>You're all forgotten how early astronomy was done.  At the turn of the century, photographs were taken through the telescope, developed, and only later analyzed closely - ''with a magnifying glass'' - as part of [http://www.astro.virginia.edu/~rjp0i/museum/photography.html Astrophotography]!  This allowed for careful tracking and analysis of the many stars that might be visible from just one frame.  (It also allowed observation of the same area of the sky at different days, or even at different years, to see which stars were moving relative to others.)  For more, look into [http://www.smithsonianmag.com/history/the-women-who-mapped-the-universe-and-still-couldnt-get-any-respect-9287444/?no-ist The Women Who Mapped the Universe] [[User:Jorgbrown|Jorgbrown]] ([[User talk:Jorgbrown|talk]]) 20:08, 11 May 2015 (UTC)</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">It seems like this explanation ought to consider that perhaps they are standing in a room painted black with white stars drawn on the ceiling (or perhaps in the dark projected/simulated like a planetarium) such that Beret Guy's use of the magnifying glass actually does bring him close enough to observe. Although this is unlikely, it seems possible. [[User:JohnHawkinson|JohnHawkinson]] ([[User talk:JohnHawkinson|talk]]) 00:13, 25 May 2020 (UTC)</ins></div></td></tr>
</table>JohnHawkinsonhttps://www.explainxkcd.com/wiki/index.php?title=Talk:1522:_Astronomy&diff=95292&oldid=prevDgbrt at 20:34, 11 June 20152015-06-11T20:34:56Z<p></p>
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<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>I'd love to see a good explanation of the optics at play and the differences between telescopes and magnifying lenses.  E.g. from {{w|Focal length}}: ''In most photography and all telescopy, where the subject is essentially infinitely far away, longer focal length (lower optical power) leads to higher magnification and a narrower angle of view; conversely, shorter focal length or higher optical power is associated with a wider angle of view. On the other hand, in applications such as microscopy in which magnification is achieved by bringing the object close to the lens, a shorter focal length (higher optical power) leads to higher magnification because the subject can be brought closer to the center of projection.''  And the reference to "resolving distance" seems like a misinterpretation.  For a good time, watch [https://en.wikipedia.org/wiki/File:Identifiable-Images-of-Bystanders-Extracted-from-Corneal-Reflections-pone.0083325.s001.ogv Stepwise magnification by 6% per frame into a 39 megapixel image. In the final frame, at about 170x, an image of a bystander is seen reflected in the man's cornea.] [[User:Nealmcb|Nealmcb]] ([[User talk:Nealmcb|talk]]) 15:11, 9 May 2015 (UTC)</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>I'd love to see a good explanation of the optics at play and the differences between telescopes and magnifying lenses.  E.g. from {{w|Focal length}}: ''In most photography and all telescopy, where the subject is essentially infinitely far away, longer focal length (lower optical power) leads to higher magnification and a narrower angle of view; conversely, shorter focal length or higher optical power is associated with a wider angle of view. On the other hand, in applications such as microscopy in which magnification is achieved by bringing the object close to the lens, a shorter focal length (higher optical power) leads to higher magnification because the subject can be brought closer to the center of projection.''  And the reference to "resolving distance" seems like a misinterpretation.  For a good time, watch [https://en.wikipedia.org/wiki/File:Identifiable-Images-of-Bystanders-Extracted-from-Corneal-Reflections-pone.0083325.s001.ogv Stepwise magnification by 6% per frame into a 39 megapixel image. In the final frame, at about 170x, an image of a bystander is seen reflected in the man's cornea.] [[User:Nealmcb|Nealmcb]] ([[User talk:Nealmcb|talk]]) 15:11, 9 May 2015 (UTC)</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>:If you (or anyone else) know enough about this, it would be great if you would correct the misinterpretation and maybe add some details. The above could be linked to via wiki. Or it could be a trivia section, if it is too much in the main explanation. I do not know enough about this to make a good explanation. --[[User:Kynde|Kynde]] ([[User talk:Kynde|talk]]) 08:24, 11 May 2015 (UTC)</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>:If you (or anyone else) know enough about this, it would be great if you would correct the misinterpretation and maybe add some details. The above could be linked to via wiki. Or it could be a trivia section, if it is too much in the main explanation. I do not know enough about this to make a good explanation. --[[User:Kynde|Kynde]] ([[User talk:Kynde|talk]]) 08:24, 11 May 2015 (UTC)</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">::The focal length doesn't fit to a telescope or microscope in the same way as it does to a single lense like a magnifying glass. The major difference is the difference of the focus. A microscope does focus on an object very close to you, a telescope is set to an infinite focus. And a simple lense just increases your angle of view. I will give a try on this even more complex physics here. --[[User:Dgbrt|Dgbrt]] ([[User talk:Dgbrt|talk]]) 20:34, 11 June 2015 (UTC)</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>[[Media:The Astonomer.jpg|Statue in Canberra, Australia of an astronomer with magnifying glass]] {{unsigned|Multimotyl}}</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>[[Media:The Astonomer.jpg|Statue in Canberra, Australia of an astronomer with magnifying glass]] {{unsigned|Multimotyl}}</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>You're all forgotten how early astronomy was done.  At the turn of the century, photographs were taken through the telescope, developed, and only later analyzed closely - ''with a magnifying glass'' - as part of [http://www.astro.virginia.edu/~rjp0i/museum/photography.html Astrophotography]!  This allowed for careful tracking and analysis of the many stars that might be visible from just one frame.  (It also allowed observation of the same area of the sky at different days, or even at different years, to see which stars were moving relative to others.)  For more, look into [http://www.smithsonianmag.com/history/the-women-who-mapped-the-universe-and-still-couldnt-get-any-respect-9287444/?no-ist The Women Who Mapped the Universe] [[User:Jorgbrown|Jorgbrown]] ([[User talk:Jorgbrown|talk]]) 20:08, 11 May 2015 (UTC)</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>You're all forgotten how early astronomy was done.  At the turn of the century, photographs were taken through the telescope, developed, and only later analyzed closely - ''with a magnifying glass'' - as part of [http://www.astro.virginia.edu/~rjp0i/museum/photography.html Astrophotography]!  This allowed for careful tracking and analysis of the many stars that might be visible from just one frame.  (It also allowed observation of the same area of the sky at different days, or even at different years, to see which stars were moving relative to others.)  For more, look into [http://www.smithsonianmag.com/history/the-women-who-mapped-the-universe-and-still-couldnt-get-any-respect-9287444/?no-ist The Women Who Mapped the Universe] [[User:Jorgbrown|Jorgbrown]] ([[User talk:Jorgbrown|talk]]) 20:08, 11 May 2015 (UTC)</div></td></tr>
</table>Dgbrthttps://www.explainxkcd.com/wiki/index.php?title=Talk:1522:_Astronomy&diff=93110&oldid=prevJorgbrown: Add note about Astrophotography2015-05-11T20:11:32Z<p>Add note about Astrophotography</p>
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<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>[[Media:The Astonomer.jpg|Statue in Canberra, Australia of an astronomer with magnifying glass]] {{unsigned|Multimotyl}}</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>[[Media:The Astonomer.jpg|Statue in Canberra, Australia of an astronomer with magnifying glass]] {{unsigned|Multimotyl}}</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>You're all forgotten how early astronomy was done.  At the turn of the century, photographs were taken through the telescope, developed, and only later analyzed closely - <del class="diffchange diffchange-inline">WITH A MAGNIFYING </del>glass!  This allowed for careful tracking and analysis of the many stars that might be visible from just one frame.  (It also allowed observation of the same area of the sky at different days, or even at different years, to see which stars were moving relative to others.)  For more, look into [http://www.smithsonianmag.com/history/the-women-who-mapped-the-universe-and-still-couldnt-get-any-respect-9287444/?no-ist The Women Who Mapped the Universe] [[User:Jorgbrown|Jorgbrown]] ([[User talk:Jorgbrown|talk]]) 20:08, 11 May 2015 (UTC)</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>You're all forgotten how early astronomy was done.  At the turn of the century, photographs were taken through the telescope, developed, and only later analyzed closely - <ins class="diffchange diffchange-inline">''with a magnifying </ins>glass<ins class="diffchange diffchange-inline">'' - as part of [http://www.astro.virginia.edu/~rjp0i/museum/photography.html Astrophotography]</ins>!  This allowed for careful tracking and analysis of the many stars that might be visible from just one frame.  (It also allowed observation of the same area of the sky at different days, or even at different years, to see which stars were moving relative to others.)  For more, look into [http://www.smithsonianmag.com/history/the-women-who-mapped-the-universe-and-still-couldnt-get-any-respect-9287444/?no-ist The Women Who Mapped the Universe] [[User:Jorgbrown|Jorgbrown]] ([[User talk:Jorgbrown|talk]]) 20:08, 11 May 2015 (UTC)</div></td></tr>
</table>Jorgbrownhttps://www.explainxkcd.com/wiki/index.php?title=Talk:1522:_Astronomy&diff=93107&oldid=prevJorgbrown: Point out that in 1900, observation of stars using magnifying glasses was common.2015-05-11T20:08:53Z<p>Point out that in 1900, observation of stars using magnifying glasses was common.</p>
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<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>[[Media:The Astonomer.jpg|Statue in Canberra, Australia of an astronomer with magnifying glass]] {{unsigned|Multimotyl}}</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>[[Media:The Astonomer.jpg|Statue in Canberra, Australia of an astronomer with magnifying glass]] {{unsigned|Multimotyl}}</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">You're all forgotten how early astronomy was done.  At the turn of the century, photographs were taken through the telescope, developed, and only later analyzed closely - WITH A MAGNIFYING glass!  This allowed for careful tracking and analysis of the many stars that might be visible from just one frame.  (It also allowed observation of the same area of the sky at different days, or even at different years, to see which stars were moving relative to others.)  For more, look into [http://www.smithsonianmag.com/history/the-women-who-mapped-the-universe-and-still-couldnt-get-any-respect-9287444/?no-ist The Women Who Mapped the Universe] [[User:Jorgbrown|Jorgbrown]] ([[User talk:Jorgbrown|talk]]) 20:08, 11 May 2015 (UTC)</ins></div></td></tr>
</table>Jorgbrownhttps://www.explainxkcd.com/wiki/index.php?title=Talk:1522:_Astronomy&diff=93053&oldid=prevKynde at 08:24, 11 May 20152015-05-11T08:24:58Z<p></p>
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<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>I'd love to see a good explanation of the optics at play and the differences between telescopes and magnifying lenses.  E.g. from {{w|Focal length}}: ''In most photography and all telescopy, where the subject is essentially infinitely far away, longer focal length (lower optical power) leads to higher magnification and a narrower angle of view; conversely, shorter focal length or higher optical power is associated with a wider angle of view. On the other hand, in applications such as microscopy in which magnification is achieved by bringing the object close to the lens, a shorter focal length (higher optical power) leads to higher magnification because the subject can be brought closer to the center of projection.''  And the reference to "resolving distance" seems like a misinterpretation.  For a good time, watch [https://en.wikipedia.org/wiki/File:Identifiable-Images-of-Bystanders-Extracted-from-Corneal-Reflections-pone.0083325.s001.ogv Stepwise magnification by 6% per frame into a 39 megapixel image. In the final frame, at about 170x, an image of a bystander is seen reflected in the man's cornea.] [[User:Nealmcb|Nealmcb]] ([[User talk:Nealmcb|talk]]) 15:11, 9 May 2015 (UTC)</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>I'd love to see a good explanation of the optics at play and the differences between telescopes and magnifying lenses.  E.g. from {{w|Focal length}}: ''In most photography and all telescopy, where the subject is essentially infinitely far away, longer focal length (lower optical power) leads to higher magnification and a narrower angle of view; conversely, shorter focal length or higher optical power is associated with a wider angle of view. On the other hand, in applications such as microscopy in which magnification is achieved by bringing the object close to the lens, a shorter focal length (higher optical power) leads to higher magnification because the subject can be brought closer to the center of projection.''  And the reference to "resolving distance" seems like a misinterpretation.  For a good time, watch [https://en.wikipedia.org/wiki/File:Identifiable-Images-of-Bystanders-Extracted-from-Corneal-Reflections-pone.0083325.s001.ogv Stepwise magnification by 6% per frame into a 39 megapixel image. In the final frame, at about 170x, an image of a bystander is seen reflected in the man's cornea.] [[User:Nealmcb|Nealmcb]] ([[User talk:Nealmcb|talk]]) 15:11, 9 May 2015 (UTC)</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">:If you (or anyone else) know enough about this, it would be great if you would correct the misinterpretation and maybe add some details. The above could be linked to via wiki. Or it could be a trivia section, if it is too much in the main explanation. I do not know enough about this to make a good explanation. --[[User:Kynde|Kynde]] ([[User talk:Kynde|talk]]) 08:24, 11 May 2015 (UTC)</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>[[Media:The Astonomer.jpg|Statue in Canberra, Australia of an astronomer with magnifying glass]] {{unsigned|Multimotyl}}</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>[[Media:The Astonomer.jpg|Statue in Canberra, Australia of an astronomer with magnifying glass]] {{unsigned|Multimotyl}}</div></td></tr>
</table>Kyndehttps://www.explainxkcd.com/wiki/index.php?title=Talk:1522:_Astronomy&diff=93052&oldid=prevKynde: Bug corrected now...? Deleting my post as no one can have read it yet2015-05-11T08:18:25Z<p>Bug corrected now...? Deleting my post as no one can have read it yet</p>
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<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>[[Media:The Astonomer.jpg|Statue in Canberra, Australia of an astronomer with magnifying glass]] {{unsigned|Multimotyl}}</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>[[Media:The Astonomer.jpg|Statue in Canberra, Australia of an astronomer with magnifying glass]] {{unsigned|Multimotyl}}</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;"></del></div></td><td colspan="2"> </td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">There is a bug on this page after the page for comic 1523 was created. The button that should direct to the newest comic (today 1523) points to this comic 1522. This is not the case for the other earlier comics - where the button redirects correctly? --[[User:Kynde|Kynde]] ([[User talk:Kynde|talk]]) 08:17, 11 May 2015 (UTC)</del></div></td><td colspan="2"> </td></tr>
</table>Kyndehttps://www.explainxkcd.com/wiki/index.php?title=Talk:1522:_Astronomy&diff=93051&oldid=prevKynde: A bug on this page2015-05-11T08:17:28Z<p>A bug on this page</p>
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<td colspan="2" style="background-color: white; color:black; text-align: center;">Revision as of 08:17, 11 May 2015</td>
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<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>[[Media:The Astonomer.jpg|Statue in Canberra, Australia of an astronomer with magnifying glass]] {{unsigned|Multimotyl}}</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>[[Media:The Astonomer.jpg|Statue in Canberra, Australia of an astronomer with magnifying glass]] {{unsigned|Multimotyl}}</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">There is a bug on this page after the page for comic 1523 was created. The button that should direct to the newest comic (today 1523) points to this comic 1522. This is not the case for the other earlier comics - where the button redirects correctly? --[[User:Kynde|Kynde]] ([[User talk:Kynde|talk]]) 08:17, 11 May 2015 (UTC)</ins></div></td></tr>
</table>Kyndehttps://www.explainxkcd.com/wiki/index.php?title=Talk:1522:_Astronomy&diff=93033&oldid=prevDavidy22: this is how you put an image on a talk page. Also sign your comments2015-05-11T00:38:57Z<p>this is how you put an image on a talk page. Also sign your comments</p>
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<td colspan="2" style="background-color: white; color:black; text-align: center;">Revision as of 00:38, 11 May 2015</td>
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<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del class="diffchange diffchange-inline">[[File:The Astonomer.jpg|thumb|Statue in Canberra, Australia of an astronomer with magnifying glass]]</del>For a telescope you can be far away, for a magnifying glass or microscope you need a ladder to be nearer to the stars. Microscopes are for biology, telescopes for astronomy.</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>For a telescope you can be far away, for a magnifying glass or microscope you need a ladder to be nearer to the stars. Microscopes are for biology, telescopes for astronomy.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>They have got a similar purpose, but look and are applied differently. Sebastian --[[Special:Contributions/108.162.254.122|108.162.254.122]] 07:09, 8 May 2015 (UTC)</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>They have got a similar purpose, but look and are applied differently. Sebastian --[[Special:Contributions/108.162.254.122|108.162.254.122]] 07:09, 8 May 2015 (UTC)</div></td></tr>
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<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>I'd love to see a good explanation of the optics at play and the differences between telescopes and magnifying lenses.  E.g. from {{w|Focal length}}: ''In most photography and all telescopy, where the subject is essentially infinitely far away, longer focal length (lower optical power) leads to higher magnification and a narrower angle of view; conversely, shorter focal length or higher optical power is associated with a wider angle of view. On the other hand, in applications such as microscopy in which magnification is achieved by bringing the object close to the lens, a shorter focal length (higher optical power) leads to higher magnification because the subject can be brought closer to the center of projection.''  And the reference to "resolving distance" seems like a misinterpretation.  For a good time, watch [https://en.wikipedia.org/wiki/File:Identifiable-Images-of-Bystanders-Extracted-from-Corneal-Reflections-pone.0083325.s001.ogv Stepwise magnification by 6% per frame into a 39 megapixel image. In the final frame, at about 170x, an image of a bystander is seen reflected in the man's cornea.] [[User:Nealmcb|Nealmcb]] ([[User talk:Nealmcb|talk]]) 15:11, 9 May 2015 (UTC)</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>I'd love to see a good explanation of the optics at play and the differences between telescopes and magnifying lenses.  E.g. from {{w|Focal length}}: ''In most photography and all telescopy, where the subject is essentially infinitely far away, longer focal length (lower optical power) leads to higher magnification and a narrower angle of view; conversely, shorter focal length or higher optical power is associated with a wider angle of view. On the other hand, in applications such as microscopy in which magnification is achieved by bringing the object close to the lens, a shorter focal length (higher optical power) leads to higher magnification because the subject can be brought closer to the center of projection.''  And the reference to "resolving distance" seems like a misinterpretation.  For a good time, watch [https://en.wikipedia.org/wiki/File:Identifiable-Images-of-Bystanders-Extracted-from-Corneal-Reflections-pone.0083325.s001.ogv Stepwise magnification by 6% per frame into a 39 megapixel image. In the final frame, at about 170x, an image of a bystander is seen reflected in the man's cornea.] [[User:Nealmcb|Nealmcb]] ([[User talk:Nealmcb|talk]]) 15:11, 9 May 2015 (UTC)</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">[[Media:The Astonomer.jpg|Statue in Canberra, Australia of an astronomer with magnifying glass]] {{unsigned|Multimotyl}}</ins></div></td></tr>
</table>Davidy22https://www.explainxkcd.com/wiki/index.php?title=Talk:1522:_Astronomy&diff=92930&oldid=prevNealmcb: magnification2015-05-09T15:15:51Z<p>magnification</p>
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<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>Woah, that's really a '''lot''' of discussion over this tiny comic. [[User:Nk22|Nk22]] ([[User talk:Nk22|talk]]) 19:06, 8 May 2015 (UTC)</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>Woah, that's really a '''lot''' of discussion over this tiny comic. [[User:Nk22|Nk22]] ([[User talk:Nk22|talk]]) 19:06, 8 May 2015 (UTC)</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>I'd love to see a good explanation of the optics at play and the differences between telescopes and magnifying lenses.  E.g. from {{w|Focal length}}: ''In most photography and all telescopy, where the subject is essentially infinitely far away, longer focal length (lower optical power) leads to higher magnification and a narrower angle of view; conversely, shorter focal length or higher optical power is associated with a wider angle of view. On the other hand, in applications such as microscopy in which magnification is achieved by bringing the object close to the lens, a shorter focal length (higher optical power) leads to higher magnification because the subject can be brought closer to the center of projection.''  And the reference to "resolving distance" seems like a misinterpretation.  [[User:Nealmcb|Nealmcb]] ([[User talk:Nealmcb|talk]]) 15:11, 9 May 2015 (UTC)</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>I'd love to see a good explanation of the optics at play and the differences between telescopes and magnifying lenses.  E.g. from {{w|Focal length}}: ''In most photography and all telescopy, where the subject is essentially infinitely far away, longer focal length (lower optical power) leads to higher magnification and a narrower angle of view; conversely, shorter focal length or higher optical power is associated with a wider angle of view. On the other hand, in applications such as microscopy in which magnification is achieved by bringing the object close to the lens, a shorter focal length (higher optical power) leads to higher magnification because the subject can be brought closer to the center of projection.''  And the reference to "resolving distance" seems like a misinterpretation.  <ins class="diffchange diffchange-inline">For a good time, watch [https://en.wikipedia.org/wiki/File:Identifiable-Images-of-Bystanders-Extracted-from-Corneal-Reflections-pone.0083325.s001.ogv Stepwise magnification by 6% per frame into a 39 megapixel image. In the final frame, at about 170x, an image of a bystander is seen reflected in the man's cornea.] </ins>[[User:Nealmcb|Nealmcb]] ([[User talk:Nealmcb|talk]]) 15:11, 9 May 2015 (UTC)</div></td></tr>
</table>Nealmcbhttps://www.explainxkcd.com/wiki/index.php?title=Talk:1522:_Astronomy&diff=92928&oldid=prevNealmcb: optics2015-05-09T15:11:52Z<p>optics</p>
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</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l35" >Line 35:</td>
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<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>Woah, that's really a '''lot''' of discussion over this tiny comic. [[User:Nk22|Nk22]] ([[User talk:Nk22|talk]]) 19:06, 8 May 2015 (UTC)</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>Woah, that's really a '''lot''' of discussion over this tiny comic. [[User:Nk22|Nk22]] ([[User talk:Nk22|talk]]) 19:06, 8 May 2015 (UTC)</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">I'd love to see a good explanation of the optics at play and the differences between telescopes and magnifying lenses.  E.g. from {{w|Focal length}}: ''In most photography and all telescopy, where the subject is essentially infinitely far away, longer focal length (lower optical power) leads to higher magnification and a narrower angle of view; conversely, shorter focal length or higher optical power is associated with a wider angle of view. On the other hand, in applications such as microscopy in which magnification is achieved by bringing the object close to the lens, a shorter focal length (higher optical power) leads to higher magnification because the subject can be brought closer to the center of projection.''  And the reference to "resolving distance" seems like a misinterpretation.  [[User:Nealmcb|Nealmcb]] ([[User talk:Nealmcb|talk]]) 15:11, 9 May 2015 (UTC)</ins></div></td></tr>
</table>Nealmcb