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<font size=5px>''Welcome to the '''explain [[xkcd]]''' wiki!''</font>
 
<font size=5px>''Welcome to the '''explain [[xkcd]]''' wiki!''</font>
  
We have an explanation for all [[:Category:Comics|'''{{#expr:{{PAGESINCAT:Comics|R}}-10}}''' xkcd comics]],
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We have an explanation for all [[:Category:Comics|'''{{#expr:{{PAGESINCAT:Comics|R}}-13}}''' xkcd comics]],
<!-- Note: the -10 in the calculation above is to discount subcategories (there are 8 of them as of 2013-02-27),
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<!-- Note: the -13 in the calculation above is to discount subcategories (there are 8 of them as of 2013-02-27),
     as well as [[List of all comics]] and [[List of unexplained comics]], which are obviously not comic pages. -->
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     as well as [[List of all comics]] and the pages it has been split across, which are obviously not comic pages.
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    The extra one difference corresponds to 404, which is not really a comic, even though we've categorised it so.
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and only {{PAGESINCAT:Incomplete articles|R}}
 
and only {{PAGESINCAT:Incomplete articles|R}}
 
({{#expr: {{PAGESINCAT:Incomplete articles|R}} / {{LATESTCOMIC}} * 100 round 0}}%) [[:Category:Incomplete articles|are incomplete]]. Help us finish them!
 
({{#expr: {{PAGESINCAT:Incomplete articles|R}} / {{LATESTCOMIC}} * 100 round 0}}%) [[:Category:Incomplete articles|are incomplete]]. Help us finish them!
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<div style="float:right; margin: 0 0 1em 1em">{{Special:ContributionScores/10/7/nosort,notools}}<div style="font-size:0.85em; width:25em; font-style:italic">[[Special:ContributionScores|Lots of people]] contribute to make this wiki a success. Many of the recent contributors, listed above, have just joined. You can do it too! Create your account [[Special:UserLogin/signup|here]].</div></div>
 
<div style="float:right; margin: 0 0 1em 1em">{{Special:ContributionScores/10/7/nosort,notools}}<div style="font-size:0.85em; width:25em; font-style:italic">[[Special:ContributionScores|Lots of people]] contribute to make this wiki a success. Many of the recent contributors, listed above, have just joined. You can do it too! Create your account [[Special:UserLogin/signup|here]].</div></div>
  
You can read a brief introduction about this wiki at [[explain xkcd]]. Feel free to sign up for an account and contribute to the wiki! We need explanations for comics, characters, themes, memes and everything in between. If it is referenced in an [[xkcd]] web comic, it should be here.
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You can read a brief introduction about this wiki at [[explain xkcd]]. Feel free to sign up for an account and contribute to the wiki! We need explanations for comics, characters, themes, memes and everything in between. If it is referenced in an [[xkcd]] web comic, it should be here.
  
* If you're new to wikis like this, take a look at these help pages describing [[mw:Help:Navigation|how to navigate]] the wiki, and [[mw:Help:Editing pages|how to edit]] pages.
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*If you're new to wikis like this, take a look at these help pages describing [[mw:Help:Navigation|how to navigate]] the wiki, and [[mw:Help:Editing pages|how to edit]] pages.
  
* Discussion about various parts of the wiki is going on at [[Explain XKCD:Community portal]]. Share your 2¢!
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*Discussion about various parts of the wiki is going on at [[Explain XKCD:Community portal]]. Share your 2¢!
  
* [[List of all comics]] contains a complete table of all xkcd comics so far and the corresponding explanations. The missing explanations are listed [[List of unexplained comics|here]]. Feel free to help out by creating them! '''[[Help:How to add a new comic explanation|Here's how]]'''.
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*[[List of all comics]] contains a table of most recent xkcd comics and links to the rest, and the corresponding explanations. There are incomplete explanations listed [[:Category:Incomplete articles|here]]. Feel free to help out by expanding them!
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*If you see that a new comic hasn't been explained yet, you can create it: '''[[Help:How to add a new comic explanation|Here's how]]'''.
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*We sell advertising space to pay for our server costs. To learn more, go [[explain xkcd:Advertise Here|here]].
  
 
== Rules ==
 
== Rules ==
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If you want to talk about a specific comic, use its discussion page.
 
If you want to talk about a specific comic, use its discussion page.
  
Please only submit material directly related to —and helping everyone better understand— xkcd... and of course ''only'' submit material that can legally be posted (and freely edited.)  Off-topic or other inappropriate content is subject to removal or modification at admin discretion, and users who repeatedly post such content will be blocked.
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Please only submit material directly related to —and helping everyone better understand— xkcd... and of course ''only'' submit material that can legally be posted (and freely edited). Off-topic or other inappropriate content is subject to removal or modification at admin discretion, and users who repeatedly post such content will be blocked.
  
 
If you need assistance from an [[explain xkcd:Administrators|admin]], post a message to the [[explain xkcd:Community portal/Admin requests|Admin requests]] board.
 
If you need assistance from an [[explain xkcd:Administrators|admin]], post a message to the [[explain xkcd:Community portal/Admin requests|Admin requests]] board.
  
 
[[Category:Root category]]
 
[[Category:Root category]]

Revision as of 03:05, 4 September 2013

Welcome to the explain xkcd wiki!

We have an explanation for all 1 xkcd comics, and only 0 (0%) are incomplete. Help us finish them!

Latest comic

Go to this comic explanation

ISS Solar Transit 2
Most people don't realize it, but they actually launch a new space station every few weeks because this keeps happening.
Title text: Most people don't realize it, but they actually launch a new space station every few weeks because this keeps happening.

Explanation

Ambox notice.png This explanation may be incomplete or incorrect: Please change this comment when editing this page. Do NOT delete this tag too soon.

This comic is a continuation to 1828: ISS Solar Transit, where Cueball is trying to capture the transit of International Space Station across the Sun. However, instead of transiting across the face of the sun, the ISS crashes into the Sun.

In reality, of course, this can never happen, because the ISS orbits Earth at an altitude of between 330 and 435 km, while the Earth orbits the Sun at an altitude of about 149.60 million kilometers or 1 astronomical unit. This means the minimum distance between the ISS and the Sun is only slightly less than 1 AU. Also, due to parallax, only people in a very localized region on earth are able to see the ISS "hit" the sun. For all others the ISS would travel past the sun.

Additionally, even if the ISS would somehow impact the sun, it would not make a noticeable splash, due to being incredibly tiny compared to the sun. It would get vaporized before reaching it (see What if? 89: Tungsten Countertop). And it would make no "Fwoosh" sound hearable from Earth, primarily because there's a lot of empty space between Earth and the Sun, and sound cannot propagate in empty space.

The title text plays on this saying that a new space station is being launched every week as the old one gets destroyed by crashing into the Sun. This is clearly implausible, as the costs (of lives and money) would be astronomical[citation needed].

Perhaps also a joke on Pink Floyd's "Set the controls for the heart of the sun"?

Transcript

[Every panel is split into two half height panels above each other.]
[The top panel shows an image of an orange sun on a black background with a dot marked ISS in a cross-hair and a trail.]
[In the bottom panel Cueball is kneeling in front of a small platform while operating a camera with a very long objective while holding a smartphone. The camera is angled sharply upward toward the sky as it is attached to a tripod standing on the platform.]
Cueball: Perfect! Transit in three... two...
[The dot marked as ISS moves closer to the sun]
Cueball: ...one...
[The dot plunges into the sun]
FWOOSH

Trivia

The ISS travels across the face of the sun in 0.47 seconds (calculation). If we assume that Cueball is counting seconds, then the depicted speed of the ISS between panels 1 and 2 is too slow.


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Lots of people contribute to make this wiki a success. Many of the recent contributors, listed above, have just joined. You can do it too! Create your account here.

You can read a brief introduction about this wiki at explain xkcd. Feel free to sign up for an account and contribute to the wiki! We need explanations for comics, characters, themes, memes and everything in between. If it is referenced in an xkcd web comic, it should be here.

  • List of all comics contains a table of most recent xkcd comics and links to the rest, and the corresponding explanations. There are incomplete explanations listed here. Feel free to help out by expanding them!
  • If you see that a new comic hasn't been explained yet, you can create it: Here's how.
  • We sell advertising space to pay for our server costs. To learn more, go here.

Rules

Don't be a jerk. There are a lot of comics that don't have set in stone explanations; feel free to put multiple interpretations in the wiki page for each comic.

If you want to talk about a specific comic, use its discussion page.

Please only submit material directly related to —and helping everyone better understand— xkcd... and of course only submit material that can legally be posted (and freely edited). Off-topic or other inappropriate content is subject to removal or modification at admin discretion, and users who repeatedly post such content will be blocked.

If you need assistance from an admin, post a message to the Admin requests board.

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