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doit_the_clown doit_the_clown
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7 years ago
A certain star is seen to have a relatively low surface temperature but a very high luminosity. What can we conclude from these observations?

(a)   The star must be very large.
(b)   The star is a small but very bright red dwarf.
(c)   The star is a main sequence star, about the size of the Sun.
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Discovering the Universe

Discovering the Universe


Edition: 7th
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Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.

Albert Einstein
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papachulopapachulo
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