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Stargazing for the Holidays

 
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ccpetersen
With a Side of Awesome


Joined: 19 Sep 2007
Posts: 3708
Location: In Coherent
PostPosted: Tue Dec 24, 2013 12:10 pm    Post subject: Stargazing for the Holidays Reply with quote
Holiday Greetings to all my VO-BB friends.

http://thespacewriter.com/wp/2013/12/24/holiday-stargazing/
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Bailey
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Joined: 04 Jun 2005
Posts: 4336
Location: Lake San Marcos... north of Connie, northwest of the Best.
PostPosted: Tue Dec 24, 2013 1:11 pm    Post subject: Reply with quote
CC... does everyone know just how large Betelgeuse is?... compared to our Sun?
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"Bailey"
a.k.a. Jim Sutton
Retired... Every day is Saturday, except Sunday.
VO-BB Member #00044 W00T.gif" alt="W00T" border="0" />
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"Be a Voice, not an Echo."Ninja
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Lee Gordon
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Joined: 25 Jul 2008
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Location: West Hartford, CT
PostPosted: Tue Dec 24, 2013 2:56 pm    Post subject: Reply with quote
Betelgeuse is 15 Billion times larger than the sun.
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Lee Gordon, O.A.V.
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Joe Trela



Joined: 23 Dec 2013
Posts: 1
Location: Antioch, CA
PostPosted: Tue Dec 24, 2013 8:42 pm    Post subject: Reply with quote
Achernar, Canopus...oh how they TAUNT me, just below the horizon!
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ccpetersen
With a Side of Awesome


Joined: 19 Sep 2007
Posts: 3708
Location: In Coherent
PostPosted: Thu Dec 26, 2013 1:03 pm    Post subject: Reply with quote
Actually, nobody really knows exactly what its mass is compared to the Sun. The usual range in the past was between 7 and 30 solar masses. It would be easy to figure out if Betelgeuse had a companion star or a planet; then we could calculate the mass more accurately. It's a supergiant star, and it's also a variable star (which makes it more tricky to derive its mass).

I've seen recent estimates of its mass to be around 11 or 12 solar masses.
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