Chemistry

Annabel Barr

5 September, 03:43

Use the drop-down menus to complete the statements about the death of stars.

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

vis left behind.

The most-massive stars may become

. which are not directly detectable.