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Author Topic: Would there be nebula's in Capella?  (Read 3643 times)

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Offline Snail

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Re: Would there be nebula's in Capella?
Reply #20 on: December 13, 2008, 09:13:11 pm
And then we have the time lag caused by the distances traveled by the light.
 

Offline Retsof

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Re: Would there be nebula's in Capella?
Reply #21 on: December 13, 2008, 09:25:07 pm
Well, the crab nebula supernova was visible in daylight (the "guest star" in ancient chinese records).  How far away was that?
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Offline Snail

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Re: Would there be nebula's in Capella?
Reply #22 on: December 13, 2008, 09:26:01 pm
Only about 7 light years IIRC.
 

Offline Retsof

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Re: Would there be nebula's in Capella?
Reply #23 on: December 13, 2008, 09:26:58 pm
Really?  Huh.  I thought it was farther.
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Offline Snail

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Re: Would there be nebula's in Capella?
Reply #24 on: December 13, 2008, 10:12:34 pm
No, wait, it's 6 THOUSAND light years. My mistake.
 

Offline KappaWing

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Re: Would there be nebula's in Capella?
Reply #25 on: December 13, 2008, 10:47:05 pm
I think if a star four light years away, like Alpha Centuari (closest star) went supernova, I think it would almost instantly create a nebula that would cover a good portion of the sky.... Delayed by four years of course.

I'm assuming a 1987A type explosion.
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Offline Retsof

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Re: Would there be nebula's in Capella?
Reply #26 on: December 13, 2008, 10:54:34 pm
Quote from: Snail on December 13, 2008, 10:12:34 pm
No, wait, it's 6 THOUSAND light years. My mistake.
Truth or Sarcasm?
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Offline KappaWing

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Re: Would there be nebula's in Capella?
Reply #27 on: December 13, 2008, 10:58:31 pm
Quote from: Retsof on December 13, 2008, 10:54:34 pm
Quote from: Snail on December 13, 2008, 10:12:34 pm
No, wait, it's 6 THOUSAND light years. My mistake.
Truth or Sarcasm?

http://en.wikipedia.org/wiki/Crab_nebula

Truth.

He probly read ly (lightyears) instead of kly (kilo-lightyears).
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Offline castor

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Re: Would there be nebula's in Capella?
Reply #28 on: December 14, 2008, 03:50:35 am
Yea, if it was 6 we definitely would know it by heart..
  

Offline Droid803

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Re: Would there be nebula's in Capella?
Reply #29 on: December 14, 2008, 11:39:23 am
Well, the RADIUS of the crab nebula is 6 ly, so if we were 6 light years from it, we'd be partially inside it (or it'd cover a good portion of the sky).
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