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Astronomy
 Online Tutoring : Forum : Homework Help - Physical Sciences : Astronomy
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Unknownmaster19
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Joined: 19May2007
Location: Canada
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Posted: 19May2007 at 8:43am | IP Logged Quote Unknownmaster19

How is the colour of a star related to its temperature?
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Nursyah
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Joined: 21August2007
Location: Malaysia
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Posted: 21August2007 at 12:36pm | IP Logged Quote Nursyah

well, byk dpt maklumat dr link ni : http://library.thinkquest.org/03oct/01944/stars.htm

dan kat cni:

http://www.schoolsobservatory.org.uk/astro/textb/stars/hotco ld.htm

Orion
The colours of Orion
A. Vannini, G. Li Causi,
A. Ricciardi and A. Garatti
Stars come in lots of different colours.

The colour depends on the temperature of the star:

  • Hot stars are blue.
  • Cooler stars are red.

Hot stars can be as hot as 30,000 C or more, but the coolest stars are only 1,000 C.

The Sun is quite a cool, yellow star. It is about 6,000 C.

The temperature of a star, and so its colour, depends on the amount of mass it has.

Very massive stars, tens of times the mass of the Sun, are the hottest, and smaller stars with less than half the mass of the Sun, are the coolest.

Although they are bigger, the hot, blue stars do not "live" as long as the smaller ones because they use up their nuclear fuel much more quickly.



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