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12 questions from this quiz
A cloud of dust and hydrogen gas
About 10 million degrees Celsius
How much mass it has when it forms
A low-mass star
Main sequence
Gravity pulling inwards and fusion energy pushing outwards
It expands and outer layers cool and turn red
Black dwarf
Much shorter lives
Massive explosion scattering heavy elements
The remaining core's mass after supernova
Created in stars and spread by supernovae
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