huge, vast clouds of ice, gas and dust

Hertzsprung–Russell(H-R)

shows the relationship between absolute magnitude (brightness) in relation to their surface temperatures.

collections of billions of stars

end of the life cycle of some supergiant stars

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Astronomy

Term	Definition
Big Bang Theroy	theory for how universe formed
Solar Nubula	huge, vast clouds of ice, gas and dust
Hertzsprung–Russell(H-R)	shows the relationship between absolute magnitude (brightness) in relation to their surface temperatures.
galaxies	collections of billions of stars
black holes	end of the life cycle of some supergiant stars