Stable planetary orbits in a binary star system only occur if the planets orbit far enough away from both stars so they appear as one object.

“so the only stable orbits around binary star systems are ones that are very far away relative to the separation of the two stars themselves so that the two stars just look like one object that they're orbiting because they are close together close enough together”

All novas occur within binary star systems where one star cannibalizes matter from its companion.

“it turns out that every nova is a binary star. So the stars plural are still there after the explosion.”

Planets can exist in stable orbits around binary star systems, provided they are positioned far enough away to experience a single gravitational field.

“if it's very far away it fears one gravity field but it does not feel heat anymore so yeah okay you want to be in in the right place”