What kind of object creates an evacuated,very hot bubble in the interstellar gas?

Question

Quizplus · Accepted Answer

Supernovae occur when massive stars run out of nuclear fuel and collapse under their own gravity. This collapse creates an extremely hot and dense core, which can then explode in a powerful burst of energy. The explosion can create an evacuated bubble in the interstellar gas, called a supernova remnant, which can be observed by astronomers.

What Kind of Object Creates an Evacuated,very Hot Bubble in the Interstellar