Talk:1342: Ancient Stars - Revision history

172.71.178.170: Add the 'usual' clue, move the top-posted addition to the bottom..

2023-11-24T18:44:34Z

Add the 'usual' clue, move the top-posted addition to the bottom..

172.70.110.28: add sig

2023-11-24T17:36:07Z

add sig

172.70.110.28 at 17:35, 24 November 2023

2023-11-24T17:35:35Z

199.27.128.218 at 18:37, 26 January 2015

2015-01-26T18:37:52Z

199.27.128.218 at 18:36, 26 January 2015

2015-01-26T18:36:05Z

Davidy22 at 22:28, 16 April 2014

2014-04-16T22:28:55Z

199.27.128.114: Defense of adding creation to surface time for photons emitted from a star.

2014-04-16T22:21:56Z

Defense of adding creation to surface time for photons emitted from a star.

Kynde at 19:56, 28 March 2014

2014-03-28T19:56:35Z

173.245.53.162 at 15:41, 14 March 2014

2014-03-14T15:41:46Z

173.245.56.65 at 15:21, 14 March 2014

2014-03-14T15:21:47Z

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-When you think about it, people are just underestimating the speed of light [[Special:Contributions/172.70.110.28|172.70.110.28]] 17:36, 24 November 2023 (UTC)
+<!--Please sign your posts with ~~~~ and don't delete this text. New comments should be added at the bottom.-->
 I knew this because Nick Cave's 2013 album *Push The Sky Away* includes the lyrics "Sirius is eight point six light years away / Arcturus is thirty seven / The past is the past and it's here to stay / Wikipedia is heaven". Obviously Randall has been listening to it! ;-) [[Special:Contributions/173.245.53.176|173.245.53.176]] 08:32, 14 March 2014 (UTC)
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 What will be different about the photons leaving the surface? They're the same, they've just been bouncing about for thousands, not millions with respect to G-type stars, of years. In that sense, it is the light we see and we must add the time. {{unsigned ip|199.27.128.114}}

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−	When you think about it, people are just underestimating the speed of light	+	When you think about it, people are just underestimating the speed of light [[Special:Contributions/172.70.110.28\|172.70.110.28]] 17:36, 24 November 2023 (UTC)

	I knew this because Nick Cave's 2013 album Push The Sky Away includes the lyrics "Sirius is eight point six light years away / Arcturus is thirty seven / The past is the past and it's here to stay / Wikipedia is heaven". Obviously Randall has been listening to it! ;-) [[Special:Contributions/173.245.53.176\|173.245.53.176]] 08:32, 14 March 2014 (UTC)		I knew this because Nick Cave's 2013 album Push The Sky Away includes the lyrics "Sirius is eight point six light years away / Arcturus is thirty seven / The past is the past and it's here to stay / Wikipedia is heaven". Obviously Randall has been listening to it! ;-) [[Special:Contributions/173.245.53.176\|173.245.53.176]] 08:32, 14 March 2014 (UTC)

← Older revision		Revision as of 17:35, 24 November 2023
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		+	When you think about it, people are just underestimating the speed of light
		+
	I knew this because Nick Cave's 2013 album Push The Sky Away includes the lyrics "Sirius is eight point six light years away / Arcturus is thirty seven / The past is the past and it's here to stay / Wikipedia is heaven". Obviously Randall has been listening to it! ;-) [[Special:Contributions/173.245.53.176\|173.245.53.176]] 08:32, 14 March 2014 (UTC)		I knew this because Nick Cave's 2013 album Push The Sky Away includes the lyrics "Sirius is eight point six light years away / Arcturus is thirty seven / The past is the past and it's here to stay / Wikipedia is heaven". Obviously Randall has been listening to it! ;-) [[Special:Contributions/173.245.53.176\|173.245.53.176]] 08:32, 14 March 2014 (UTC)

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 In the comic, the lifespan of stars is also vastly underestimated. A thousand years is nothing when their age is generally counted in millions or billions of years. What is the probability a near-visible star died in the last thousand years and wouldn't that be a major astronomical event? [[User:Ralfoide|Ralfoide]] ([[User talk:Ralfoide|talk]]) 14:21, 14 March 2014 (UTC)
 :In the comic, the lifespan of stars isn't even mentioned in passing.  The history of supernovae is pretty well documented and goes back nearly 2000 years, so the light from those supernovae is probably not more than 2200 years old...[[Special:Contributions/173.245.56.65|173.245.56.65]] 15:21, 14 March 2014 (UTC)
-:Actually, it is mentioned in passing, in the first panel. "The light from that star was emitted thousands of years ago. ''It could be long gone.''" (Emphasis mine.) While it is true that [http://xkcd.com/1425 technically] this is still true as it always "could" be long gone, it is in fact most likely still around. Even if the light were a few thousand years old, it's the blink of an eye to stars that live for billions of years. After all, it's roughly equivalent (given average lifespans) to "We haven't seen Steve in half an hour. For all we know he could be dead by now." Yes, possible. No, not likely. [[Special:Contributions/199.27.128.218|199.27.128.218]] 18:36, 26 January 2015 (UTC)
+:Actually, it is mentioned in passing, in the first panel. "The light from that star was emitted thousands of years ago. ''It could be long gone.''" (Emphasis mine.) While it is true that [http://xkcd.com/1475 technically] this is still true as it always "could" be long gone, it is in fact most likely still around. Even if the light were a few thousand years old, it's the blink of an eye to stars that live for billions of years. After all, it's roughly equivalent (given average lifespans) to "We haven't seen Steve in half an hour. For all we know he could be dead by now." Yes, possible. No, not likely. [[Special:Contributions/199.27.128.218|199.27.128.218]] 18:36, 26 January 2015 (UTC)
 Of course, one could also add the time it takes for the radiation to reach the surface of the star ;) [[Special:Contributions/173.245.53.162|173.245.53.162]] 15:41, 14 March 2014 (UTC)

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 In the comic, the lifespan of stars is also vastly underestimated. A thousand years is nothing when their age is generally counted in millions or billions of years. What is the probability a near-visible star died in the last thousand years and wouldn't that be a major astronomical event? [[User:Ralfoide|Ralfoide]] ([[User talk:Ralfoide|talk]]) 14:21, 14 March 2014 (UTC)
 :In the comic, the lifespan of stars isn't even mentioned in passing.  The history of supernovae is pretty well documented and goes back nearly 2000 years, so the light from those supernovae is probably not more than 2200 years old...[[Special:Contributions/173.245.56.65|173.245.56.65]] 15:21, 14 March 2014 (UTC)
 Of course, one could also add the time it takes for the radiation to reach the surface of the star ;) [[Special:Contributions/173.245.53.162|173.245.53.162]] 15:41, 14 March 2014 (UTC)

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	It is true that the energy released at the centre of the star may take millions of years to reach the surface. But it will not be the light we see until it leaves the surface of the star, as light cannot propagate through the plasma of the stars interior. So - no - we could not add this time;-) [[User:Kynde\|Kynde]] ([[User talk:Kynde\|talk]]) 19:56, 28 March 2014 (UTC)		It is true that the energy released at the centre of the star may take millions of years to reach the surface. But it will not be the light we see until it leaves the surface of the star, as light cannot propagate through the plasma of the stars interior. So - no - we could not add this time;-) [[User:Kynde\|Kynde]] ([[User talk:Kynde\|talk]]) 19:56, 28 March 2014 (UTC)

−	What will be different about the photons leaving the surface? They're the same, they've just been bouncing about for thousands, not millions with respect to G-type stars, of years. In that sense, it is the light we see and we must add the time.	+	What will be different about the photons leaving the surface? They're the same, they've just been bouncing about for thousands, not millions with respect to G-type stars, of years. In that sense, it is the light we see and we must add the time. {{unsigned ip\|199.27.128.114}}

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	It is true that the energy released at the centre of the star may take millions of years to reach the surface. But it will not be the light we see until it leaves the surface of the star, as light cannot propagate through the plasma of the stars interior. So - no - we could not add this time;-) [[User:Kynde\|Kynde]] ([[User talk:Kynde\|talk]]) 19:56, 28 March 2014 (UTC)		It is true that the energy released at the centre of the star may take millions of years to reach the surface. But it will not be the light we see until it leaves the surface of the star, as light cannot propagate through the plasma of the stars interior. So - no - we could not add this time;-) [[User:Kynde\|Kynde]] ([[User talk:Kynde\|talk]]) 19:56, 28 March 2014 (UTC)
		+
		+	What will be different about the photons leaving the surface? They're the same, they've just been bouncing about for thousands, not millions with respect to G-type stars, of years. In that sense, it is the light we see and we must add the time.

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	Of course, one could also add the time it takes for the radiation to reach the surface of the star ;) [[Special:Contributions/173.245.53.162\|173.245.53.162]] 15:41, 14 March 2014 (UTC)		Of course, one could also add the time it takes for the radiation to reach the surface of the star ;) [[Special:Contributions/173.245.53.162\|173.245.53.162]] 15:41, 14 March 2014 (UTC)
		+
		+	It is true that the energy released at the centre of the star may take millions of years to reach the surface. But it will not be the light we see until it leaves the surface of the star, as light cannot propagate through the plasma of the stars interior. So - no - we could not add this time;-) [[User:Kynde\|Kynde]] ([[User talk:Kynde\|talk]]) 19:56, 28 March 2014 (UTC)

← Older revision		Revision as of 15:41, 14 March 2014
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	In the comic, the lifespan of stars is also vastly underestimated. A thousand years is nothing when their age is generally counted in millions or billions of years. What is the probability a near-visible star died in the last thousand years and wouldn't that be a major astronomical event? [[User:Ralfoide\|Ralfoide]] ([[User talk:Ralfoide\|talk]]) 14:21, 14 March 2014 (UTC)		In the comic, the lifespan of stars is also vastly underestimated. A thousand years is nothing when their age is generally counted in millions or billions of years. What is the probability a near-visible star died in the last thousand years and wouldn't that be a major astronomical event? [[User:Ralfoide\|Ralfoide]] ([[User talk:Ralfoide\|talk]]) 14:21, 14 March 2014 (UTC)
	:In the comic, the lifespan of stars isn't even mentioned in passing. The history of supernovae is pretty well documented and goes back nearly 2000 years, so the light from those supernovae is probably not more than 2200 years old...[[Special:Contributions/173.245.56.65\|173.245.56.65]] 15:21, 14 March 2014 (UTC)		:In the comic, the lifespan of stars isn't even mentioned in passing. The history of supernovae is pretty well documented and goes back nearly 2000 years, so the light from those supernovae is probably not more than 2200 years old...[[Special:Contributions/173.245.56.65\|173.245.56.65]] 15:21, 14 March 2014 (UTC)
		+
		+	Of course, one could also add the time it takes for the radiation to reach the surface of the star ;) [[Special:Contributions/173.245.53.162\|173.245.53.162]] 15:41, 14 March 2014 (UTC)

← Older revision		Revision as of 15:21, 14 March 2014
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	In the comic, the lifespan of stars is also vastly underestimated. A thousand years is nothing when their age is generally counted in millions or billions of years. What is the probability a near-visible star died in the last thousand years and wouldn't that be a major astronomical event? [[User:Ralfoide\|Ralfoide]] ([[User talk:Ralfoide\|talk]]) 14:21, 14 March 2014 (UTC)		In the comic, the lifespan of stars is also vastly underestimated. A thousand years is nothing when their age is generally counted in millions or billions of years. What is the probability a near-visible star died in the last thousand years and wouldn't that be a major astronomical event? [[User:Ralfoide\|Ralfoide]] ([[User talk:Ralfoide\|talk]]) 14:21, 14 March 2014 (UTC)
		+	:In the comic, the lifespan of stars isn't even mentioned in passing. The history of supernovae is pretty well documented and goes back nearly 2000 years, so the light from those supernovae is probably not more than 2200 years old...[[Special:Contributions/173.245.56.65\|173.245.56.65]] 15:21, 14 March 2014 (UTC)