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02-25-2003, 05:09 PM
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Join Date: March 6, 2001
Location: Somewhere on Earth - it changes often
Posts: 1,292
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I've often noticed a few stars twinkle between a yellowish white and red.
Sometimes there appears to be a green in one or two. Does anyone know the explaination for this? Dying stars? Atmospheric illusion? Aliens playing paint ball? |
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02-25-2003, 05:23 PM
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Ma'at - Goddess of Truth & Justice
 Join Date: September 15, 2002
Location: Kennewick, WA
Age: 53
Posts: 3,166
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Its dust in the atmosphere. Distortion can play havoc with a star. Kinda cool aye? [img]graemlins/cool.gif[/img]
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02-25-2003, 05:25 PM
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#3 |
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Xanathar Thieves Guild
 Join Date: January 8, 2001
Location: Charlotte,NC
Age: 61
Posts: 4,570
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Different types of starts give off different light. Not that I'm any kind of expert
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02-25-2003, 05:30 PM
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#4 | |
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Join Date: March 6, 2001
Location: Somewhere on Earth - it changes often
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Quote:
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02-25-2003, 05:33 PM
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Unicorn
 Join Date: October 4, 2001
Location: Kingdom of the West,..P.o. Cynagus
Posts: 4,212
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It's really quite simple...Star color is determined by the type and class of star. They go from supper hot Blue-white to the Brown dwarfs(which can only be seen in IR). Our star, Sol, is yellow G2 star. Betelguise is a red giant and so on. Also confusing are the planets which have colors of thei own. The atmosphere will modify the true colors somewhat.
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02-25-2003, 05:52 PM
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#6 |
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Join Date: March 6, 2001
Location: Somewhere on Earth - it changes often
Posts: 1,292
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But Arvon, do you know what causes the change in a twinkle? White/red/white/red for example?
And is that then a red star or a white star? |
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02-25-2003, 06:00 PM
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#7 |
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Unicorn
Join Date: October 4, 2001
Location: Kingdom of the West,..P.o. Cynagus
Posts: 4,212
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Assuming you are not seeing aircraft navigation lights, the 'twinkling' is primarily due to the change in refrection in the atmosphere. Dust, dirt, and smoke will affect true color. There are several astronimy programs available that can give the information on various stars, planets and nebula.
With the fires you had down there it most likely would be impossible to determine true color. Try in your winter. The air is more stable. [ 02-25-2003, 06:02 PM: Message edited by: Arvon ]
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02-25-2003, 07:53 PM
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#8 |
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Avatar
 Join Date: June 8, 2001
Location: The forest
Posts: 526
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Thses last few nights in Holland have been perfect to look at the stars as we had mostly cloudless nights. I haven't seen a twinkling one yet though, watching them right now.
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02-25-2003, 08:22 PM
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#9 |
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Symbol of Cyric
 Join Date: June 15, 2002
Location: Denmark
Age: 44
Posts: 1,163
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Yeah, the twinkling is definately atmospheric effects.
If you can see a slight (veery slight) colour difference it might also be because stars actually have different colours. Our sun, for example is yellow, while many larger stars are blue. Old stars tends to be red. Green stars does exist. Oh yeah, and there are brown stars, but they give off so little light that they cannot be seen from here.
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The Bleak Caballero<br /><br />Proud and original member (and secret admirer) of the Pro-Mazzy movement. |
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02-25-2003, 08:27 PM
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#10 |
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Arvon said it all. Looks like we got ourselves the perfect astronomer.
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