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Biology, 16.04.2020 00:53 QueenNerdy889

When a supergiant explodes, a occurs.

A supernova may leave behind a , which is the size of a large city.

When the outer portion of a red giant expands and is blown away, a is left behind.

The most-massive stars may become , which are not directly detectable.

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When a supergiant explodes, a occurs.

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