What are supernovae?
A. stars that have reached the end of their lifetimes because their nuclear fuel is exhausted
B. stars that suddenly brighten by 100 to 10,000 times in a day
с. stars that have just been born
D. galaxles that have binary systems


Sagot :

Answer:

A

Explanation:

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Answer:

A. Stars that have reached the end of their lifetimes because their nuclear fuel

Explanation:

plato

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