Can a planet survive its star's death and keep its atmosphere?

A planet can sometimes keep its atmosphere even after its star dies, it depends on how close it is and what happens to the star.

Imagine your star is like a big, warm oven in the kitchen, and your planet is a pie inside that oven. The oven keeps the pie warm and soft. Now, when the oven cools down (that’s like the star dying), the pie might get cold, but if it's close enough to the oven, it can still stay warm and keep its gooey filling (like an atmosphere).

Sometimes, a star gets really big and puffy before it dies, kind of like when your balloon gets too full and pops. When that happens, it might swallow up nearby planets or blow off some of their atmosphere like confetti.

But if the planet is far enough away, like sitting on a shelf instead of inside the oven, it can stay cozy even after the star cools down, maybe even get new layers around it!

So yes, a planet can keep its atmosphere, it just depends on how lucky it is with its star’s death. A planet can sometimes keep its atmosphere even after its star dies, it depends on how close it is and what happens to the star.

Imagine your star is like a big, warm oven in the kitchen, and your planet is a pie inside that oven. The oven keeps the pie warm and soft. Now, when the oven cools down (that’s like the star dying), the pie might get cold, but if it's close enough to the oven, it can still stay warm and keep its gooey filling (like an atmosphere).