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Which of the following kinds of stars will have average brightness and temperature?
true
nuclear fusion
main sequence
gravity
is an elliptical galaxy.
stars are at different points in their life cycles.
It is hotter.
red shift of distant galaxies.
The statement that the mass of the universe comes entirely from the billions of galaxies which are made of billions of stars is
true
nuclear fusion
main sequence
gravity
is an elliptical galaxy.
stars are at different points in their life cycles.
It is hotter.
red shift of distant galaxies.
How do elements with atomic numbers greater than that of lithium form?
true
nuclear fusion
main sequence
gravity
is an elliptical galaxy.
stars are at different points in their life cycles.
It is hotter.
red shift of distant galaxies.
How does a blue star differ from a yellow star?
true
nuclear fusion
main sequence
gravity
is an elliptical galaxy.
stars are at different points in their life cycles.
It is hotter.
red shift of distant galaxies.
What holds planets, stars, gas and dust together in a galaxy?
true
nuclear fusion
main sequence
gravity
is an elliptical galaxy.
stars are at different points in their life cycles.
It is hotter.
red shift of distant galaxies.
All of the following are true if the Milky Way, except that it
true
nuclear fusion
main sequence
gravity
is an elliptical galaxy.
stars are at different points in their life cycles.
It is hotter.
red shift of distant galaxies.
Scientists know that the universe is expanding because of
true
nuclear fusion
main sequence
gravity
is an elliptical galaxy.
stars are at different points in their life cycles.
It is hotter.
red shift of distant galaxies.
Astronomers have discovered vast differences in stars through their observations. One theory used to explain these differences is that
true
nuclear fusion
main sequence
gravity
is an elliptical galaxy.
stars are at different points in their life cycles.
It is hotter.
red shift of distant galaxies.
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