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Stars
Posted: Mon Dec 12, 2005 9:12 am
by Em
How big is the largest star on record? And where is it?
Posted: Mon Dec 12, 2005 10:03 am
by harry
Do you want size or mass.
Some stars are only a few kilometers across with the same mass as our sun.
While others are 100 times the size of our sun and yet their mass is only a fraction.
Have a nice day
Posted: Mon Dec 12, 2005 12:09 pm
by Em
Thank you for your response Harry
![Surprised :o](./images/smilies/icon_surprised.gif)
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I meant size.
Would you be able to refer me to a website or like that answers all the basic questions on the universe that one might ask e.g how old is the earth? Do we know if there is an order in which our planets were formed? etc.
Posted: Mon Dec 12, 2005 12:36 pm
by Empeda2
Welcome em
I find that
http://www.nineplanets.org was always a good source for info for the solar system.
As for massive stars - try googling 'Eta Carina' and also 'Wolf-Rayet Stars" - they're pretty big....
Posted: Mon Dec 12, 2005 9:13 pm
by Em
Thanks Empeda 2
![Smile :)](./images/smilies/icon_smile.gif)
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Have a great day!
Posted: Mon Dec 12, 2005 9:23 pm
by Dani
Posted: Mon Dec 12, 2005 10:17 pm
by Em
Thanks Dani, that's exactly what i was after!
Posted: Tue Dec 13, 2005 2:40 am
by Orca
The universe simulator
Celestia makes a vivid illustration of the differences in diameters stars can be. I took these screenies from within the program.
Here's the Sun, as seen from Saturn, at about 9 AU (Astronomical Units...1 AU is equal to the distance from the Sun to the Earth):
Just a tiny yellow dot.
Now here's the red giant Betelgeuse (in the constellation Orion) at a distance of 9 AU:
The giant doesn't even fit in the screen. Also, the distances are from the surfaces of the two stars...
![Shocked :shock:](./images/smilies/icon_eek.gif)
[/list]
Posted: Tue Dec 13, 2005 4:27 am
by harry
Hello Dani
Thank you for the links
http://antwrp.gsfc.nasa.gov/apod/ap971008.html
http://www.xs4all.nl/~carlkop/lbv1806.html
These Giant stars are very interesting.
Has anybody calculated or estimated the mass.
I'd love to know the size of the Core.
Posted: Tue Dec 13, 2005 4:38 am
by Em
How is the size of the core calculated?
Posted: Tue Dec 13, 2005 4:48 am
by harry
By guesstimate and by the temperature and by the graviational effects on the surrounding space bodies.
The problem with distant giants is that you maybe looking at a multiple of stars looking as one.
My Question is that if you have a star 5 million times the size of our star. Why does it not behave like a black hole.
Posted: Tue Dec 13, 2005 9:29 am
by Empeda2
Because we're talking about physical diameter/volume - not the mass of the star.
Posted: Tue Dec 13, 2005 10:03 am
by harry
Something fishy is happening with the giant stars. There is more than meets the eye.
Posted: Tue Dec 13, 2005 10:31 am
by Em
What do you mean Harry?
Posted: Tue Dec 13, 2005 11:43 am
by harry
In the Links above they are talking about stars 5 to 40 billion times that of our sun.
Something does not add up
I may need sleep
smile,,,,,,,,,,,,,i feel warped out