2878: Supernova - Revision history

B for brain: /* Explanation */

2024-01-13T15:02:43Z

‎Explanation

172.68.34.60: /* Explanation */

2024-01-11T17:20:56Z

‎Explanation

172.71.242.161: /* Explanation */

2024-01-11T09:37:06Z

‎Explanation

141.101.98.104: Undo revision 332651 by 172.68.34.61 (talk) ...no? Why?

2024-01-11T00:39:58Z

Undo revision 332651 by 172.68.34.61 (talk) ...no? Why?

172.68.34.61 at 19:13, 10 January 2024

2024-01-10T19:13:11Z

172.70.90.173: /* Explanation */ "is matches" clearly from a prior retensing-edit. Adding "might" because of vagueness.

2024-01-10T16:26:50Z

‎Explanation: "is matches" clearly from a prior retensing-edit. Adding "might" because of vagueness.

Laser813: A bit of clarity around the light curve "re-imagining"

2024-01-10T16:23:05Z

A bit of clarity around the light curve "re-imagining"

141.101.99.177: /* Explanation */

2024-01-10T15:22:37Z

‎Explanation

172.71.242.3: /* Explanation */

2024-01-10T09:39:15Z

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172.71.178.190: /* Explanation */

2024-01-10T09:37:51Z

‎Explanation

← Older revision		Revision as of 15:02, 13 January 2024
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	==Explanation==		==Explanation==
−	~~{{incomplete\|Created by A CAGEY MOSTLY HAPPY ASTRONOMER - Please change this comment when editing this page. Do NOT delete this tag too soon.}}~~
	A {{w\|supernova}} occurs when a heavy star can no longer produce enough energy to fight its own gravity, e.g. because its fuel runs out ({{w\|type II supernova\|type II}}) or because it has accreted too much mass from a binary companion ({{w\|type Ia supernova\|type Ia}}). The collapsing mass leads to a violent explosion, one of the most interesting events for astronomers to observe and one that can be used to glean information about the universe.		A {{w\|supernova}} occurs when a heavy star can no longer produce enough energy to fight its own gravity, e.g. because its fuel runs out ({{w\|type II supernova\|type II}}) or because it has accreted too much mass from a binary companion ({{w\|type Ia supernova\|type Ia}}). The collapsing mass leads to a violent explosion, one of the most interesting events for astronomers to observe and one that can be used to glean information about the universe.

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 However, this comic reimagines the shape of a light curve graph to depict the relationship between the distance of supernovae from Earth, and the consequent happiness of astronomers, which happens to take a similar form. The further away the supernova occurs, the less detail can be learned from it, so the graph beyond the maximum happiness distance appears to show an {{wiktionary|asymptotic}} approach to less and less astronomer happiness. On the other hand, a {{w|near-earth supernova}} close enough to flood the Earth with significant amounts of gamma and X-ray radiation might be considered ''too'' close. Its radiation could destroy life on Earth, or at least significantly harm the biosphere, which would be a bad thing.{{cn}} Astronomers (and many others) would be really unhappy if that happened, shown as a sharp drop in happiness towards smaller distances and negative happiness values for a supernova that is very close. In fact, if a supernova were to instantly destroy Earth, or kill off all life on it, astronomers may no longer be able to be happy or unhappy (depending on your theological/spiritual feelings), so distance values close to zero have undefined astronomer happiness values.
-Many astronomers watch and study the stars in the night sky, even those that don't change appreciably over human timescales, but observing and recording such a huge event would be interesting for many reasons. Humans can observe some supernovae with the naked eye, especially if they occur within {{w|Milky Way|our own galaxy}}. A potential supernova in the news lately is {{w|Betelgeuse}}, a {{w|red giant}} star that is the left shoulder in the constellation Orion. About 430 light years from the Sun, it has been pulsating, dimming and brightening over exceedingly short time scales compared to the tens of millions of years such a big star is expected to burn. Betelgeuse should be far enough away from Earth that the inevitable explosion would be safe enough for life on Earth (although [https://www.skyatnightmagazine.com/space-science/earth-danger-betelgeuse-supernova some assessments] are not so sure), but it ''will'' outshine all other stars in the night sky, possibly competing with the Moon, and could even be visible during daytime. This would be a dream come true for many astronomers and something obvious to others interested in the night sky. In the first [[:Category:Stargazing | Stargazing]] comic, [[1644: Stargazing | 1644]], the wish that it goes supernova (in [[Randall|Randall's]] lifetime) is clearly expressed.
+Many astronomers watch and study the stars in the night sky, even those that don't change appreciably over human timescales, but observing and recording such a huge event would be interesting for many reasons. Humans can observe some supernovae with the naked eye, especially if they occur within {{w|Milky Way|our own galaxy}}. A potential supernova in the news lately is {{w|Betelgeuse}}, a {{w|red giant}} star that is the left shoulder in the constellation Orion. About 430 light years from the Sun, it has been pulsating, dimming and brightening over exceedingly short time scales compared to the tens of millions of years such a big star is expected to burn. Betelgeuse should be far enough away from Earth that the inevitable explosion would be safe enough for life on Earth (although [https://www.skyatnightmagazine.com/space-science/earth-danger-betelgeuse-supernova some assessments] are not so sure), but it ''will'' outshine all other stars in the night sky, competing with the Moon, and could even be visible during daytime. This would be a dream come true for many astronomers and something obvious to others interested in the night sky. In the first [[:Category:Stargazing | Stargazing]] comic, [[1644: Stargazing | 1644]], the wish that it goes supernova (in [[Randall|Randall's]] lifetime) is clearly expressed.
-Since this ''should'' be safe for us, and since it would be a spectacle not seen for hundreds of years here on Earth, this would make astronomers very happy, not just from all they could learn, but also from all the increased interest in gazing at the sky with the 'new' star (and then seeing what happens to it next).
+Since this ''should'' be safe for us, and since it would be a spectacle not seen at least since the start of recorded history, and unlikely to be seen again by human eyes, this would make astronomers very happy, not just from all they could learn, but also from all the increased interest in gazing at the sky with the 'new' star (and then seeing what happens to it next).
 There are thought to be about three supernovae occurring per century within our own galaxy (most of which are much further away than Betelgeuse), and many other galaxies within which a supernova explosion can be detected. These remain useful to see, and are often studied as intensively as possible, but have decreasing amounts of thrill to them and are harder to notice/record in the early stages of the explosion (or immediately before, to add even more understanding).

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 There are thought to be about three supernovae occurring per century within our own galaxy (most of which are much further away than Betelgeuse), and many other galaxies within which a supernova explosion can be detected. These remain useful to see, and are often studied as intensively as possible, but have decreasing amounts of thrill to them and are harder to notice/record in the early stages of the explosion (or immediately before, to add even more understanding).
-The title text expands upon the point of "too close" supernovae, claiming that astronomers are not quite clear or perhaps unwilling to admit how close they would like a supernova to be. If it were {{what if|73|close enough}} to severely impact the quality of human life, they would presumably not be happy, but the title text suggests that they might actually be willing to accept some trouble on Earth if they get to the see a supernova comparatively close by.
+The title text expands upon the point of "too close" supernovae, claiming that astronomers are not quite clear or perhaps unwilling to admit how close they would like a supernova to be. If it were {{what if|73|close enough}} to severely impact the quality of human life, they would presumably not be happy, but the title text suggests that they might actually be willing to accept some trouble on Earth if they get to see a supernova comparatively close by.
 This is the second comic in a row that mentions exploding stars, after [[2877: Fever]], which like this comic is also a [[:Category:Charts|Charts comic]].

@@ Line 11: / Line 11: @@
 ==Explanation==
 {{incomplete|Created by A CAGEY MOSTLY HAPPY ASTRONOMER - Please change this comment when editing this page. Do NOT delete this tag too soon.}}
-A {{w|supernova}} occurs when a heavy star can no longer produce enough energy to fight its own gravity, e.g. because its fuel runs out ({{w|type II supernova|type II}}) or because it has accreted too much mass from a binary companion ({{w|type Ia supernova|type Ia}}). The collapsing mass leads to a violent explosion, one of the most interesting events for astronomers to observe and one that can be used to glean information about the universe. I mean, what, does Randall think, that he's an astronomer?
+A {{w|supernova}} occurs when a heavy star can no longer produce enough energy to fight its own gravity, e.g. because its fuel runs out ({{w|type II supernova|type II}}) or because it has accreted too much mass from a binary companion ({{w|type Ia supernova|type Ia}}). The collapsing mass leads to a violent explosion, one of the most interesting events for astronomers to observe and one that can be used to glean information about the universe.
 At first glance, the curved line on this graph might match that of the typical {{w|light curve}} of a type Ia supernova, constructed by plotting the brightness of the supernova as a function of time, with negative values indicating a logarithmic luminosity scale (below zero means a linear luminosity of less than the unit amount). In the event of a supernova, a star (which may previously have been unremarkable) becomes notably bright over a short period of time before trailing off again to leave a stellar remnant and expanding cloud of ejecta. Around the time of this comic's release new constraints on the expansion of the universe from the observation of type Ia supernovae were [https://news.fnal.gov/2024/01/final-supernova-results-from-dark-energy-survey-offer-unique-insights-into-the-expansion-of-the-universe/ published], which used the regular shape of their light curves to establish a distance scale.

@@ Line 11: / Line 11: @@
 ==Explanation==
 {{incomplete|Created by A CAGEY MOSTLY HAPPY ASTRONOMER - Please change this comment when editing this page. Do NOT delete this tag too soon.}}
-A {{w|supernova}} occurs when a heavy star can no longer produce enough energy to fight its own gravity, e.g. because its fuel runs out ({{w|type II supernova|type II}}) or because it has accreted too much mass from a binary companion ({{w|type Ia supernova|type Ia}}). The collapsing mass leads to a violent explosion, one of the most interesting events for astronomers to observe and one that can be used to glean information about the universe.
+A {{w|supernova}} occurs when a heavy star can no longer produce enough energy to fight its own gravity, e.g. because its fuel runs out ({{w|type II supernova|type II}}) or because it has accreted too much mass from a binary companion ({{w|type Ia supernova|type Ia}}). The collapsing mass leads to a violent explosion, one of the most interesting events for astronomers to observe and one that can be used to glean information about the universe. I mean, what, does Randall think, that he's an astronomer?
 At first glance, the curved line on this graph might match that of the typical {{w|light curve}} of a type Ia supernova, constructed by plotting the brightness of the supernova as a function of time, with negative values indicating a logarithmic luminosity scale (below zero means a linear luminosity of less than the unit amount). In the event of a supernova, a star (which may previously have been unremarkable) becomes notably bright over a short period of time before trailing off again to leave a stellar remnant and expanding cloud of ejecta. Around the time of this comic's release new constraints on the expansion of the universe from the observation of type Ia supernovae were [https://news.fnal.gov/2024/01/final-supernova-results-from-dark-energy-survey-offer-unique-insights-into-the-expansion-of-the-universe/ published], which used the regular shape of their light curves to establish a distance scale.

@@ Line 13: / Line 13: @@
 A {{w|supernova}} occurs when a heavy star can no longer produce enough energy to fight its own gravity, e.g. because its fuel runs out ({{w|type II supernova|type II}}) or because it has accreted too much mass from a binary companion ({{w|type Ia supernova|type Ia}}). The collapsing mass leads to a violent explosion, one of the most interesting events for astronomers to observe and one that can be used to glean information about the universe.
-At first glance, this graph appears to show the typical {{w|light curve}} of a type Ia supernova, constructed by plotting the brightness of the supernova as a function of time, with negative values indicating a logarithmic luminosity scale (below zero means a linear luminosity of less than the unit amount). In the event of a supernova, a star (which may previously have been unremarkable) becomes notably bright over a short period of time before trailing off again to leave a stellar remnant and expanding cloud of ejecta. Around the time of this comic's release new constraints on the expansion of the universe from the observation of type Ia supernovae were [https://news.fnal.gov/2024/01/final-supernova-results-from-dark-energy-survey-offer-unique-insights-into-the-expansion-of-the-universe/ published], which used the regular shape of their light curves to establish a distance scale.
+At first glance, the curved line on this graph is matches that of the typical {{w|light curve}} of a type Ia supernova, constructed by plotting the brightness of the supernova as a function of time, with negative values indicating a logarithmic luminosity scale (below zero means a linear luminosity of less than the unit amount). In the event of a supernova, a star (which may previously have been unremarkable) becomes notably bright over a short period of time before trailing off again to leave a stellar remnant and expanding cloud of ejecta. Around the time of this comic's release new constraints on the expansion of the universe from the observation of type Ia supernovae were [https://news.fnal.gov/2024/01/final-supernova-results-from-dark-energy-survey-offer-unique-insights-into-the-expansion-of-the-universe/ published], which used the regular shape of their light curves to establish a distance scale.
-However, upon closer inspection this comic purports to depict the relationship between the distance of supernovae from Earth, and the consequent happiness of astronomers, which happens to take a similar form. The further away the supernova occurs, the less detail can be learned from it, so the graph beyond the maximum happiness distance appears to show an {{wiktionary|asymptotic}} approach to less and less astronomer happiness. On the other hand, a {{w|near-earth supernova}} close enough to flood the Earth with significant amounts of gamma and X-ray radiation might be considered ''too'' close. Its radiation could destroy life on Earth, or at least significantly harm the biosphere, which would be a bad thing.{{cn}} Astronomers (and many others) would be really unhappy if that happened, shown as a sharp drop in happiness towards smaller distances and negative happiness values for a supernova that is very close. In fact, if a supernova were to instantly destroy Earth, or kill off all life on it, astronomers may no longer be able to be happy or unhappy (depending on your theological/spiritual feelings), so distance values close to zero have undefined astronomer happiness values.
+However, this comic reimagines the shape of a light curve graph to depict the relationship between the distance of supernovae from Earth, and the consequent happiness of astronomers, which happens to take a similar form. The further away the supernova occurs, the less detail can be learned from it, so the graph beyond the maximum happiness distance appears to show an {{wiktionary|asymptotic}} approach to less and less astronomer happiness. On the other hand, a {{w|near-earth supernova}} close enough to flood the Earth with significant amounts of gamma and X-ray radiation might be considered ''too'' close. Its radiation could destroy life on Earth, or at least significantly harm the biosphere, which would be a bad thing.{{cn}} Astronomers (and many others) would be really unhappy if that happened, shown as a sharp drop in happiness towards smaller distances and negative happiness values for a supernova that is very close. In fact, if a supernova were to instantly destroy Earth, or kill off all life on it, astronomers may no longer be able to be happy or unhappy (depending on your theological/spiritual feelings), so distance values close to zero have undefined astronomer happiness values.
 Many astronomers watch and study the stars in the night sky, even those that don't change appreciably over human timescales, but observing and recording such a huge event would be interesting for many reasons. Humans can observe some supernovae with the naked eye, especially if they occur within {{w|Milky Way|our own galaxy}}. A potential supernova in the news lately is {{w|Betelgeuse}}, a {{w|red giant}} star that is the left shoulder in the constellation Orion. About 430 light years from the Sun, it has been pulsating, dimming and brightening over exceedingly short time scales compared to the tens of millions of years such a big star is expected to burn. Betelgeuse should be far enough away from Earth that the inevitable explosion would be safe enough for life on Earth (although [https://www.skyatnightmagazine.com/space-science/earth-danger-betelgeuse-supernova some assessments] are not so sure), but it ''will'' outshine all other stars in the night sky, possibly competing with the Moon, and could even be visible during daytime. This would be a dream come true for many astronomers and something obvious to others interested in the night sky. In the first [[:Category:Stargazing | Stargazing]] comic, [[1644: Stargazing | 1644]], the wish that it goes supernova (in [[Randall|Randall's]] lifetime) is clearly expressed.