Question

When a red giant finally throws off about half of its mass into space, it forms a?

Answer 1

When the red giant star starts to die out, throwing out the last outer layers. It forms a glowing ring of gas called the planetary nebula.

Answer 2

Answer : Planetary Nebula.

Explanation : A planetary nebula is formed when a red giant star throes off abut half of its mass and disintegrates.

Planetary Nebula is abbreviated as PN or plural PNe, is observed to be a type of emission nebula consists of expanding, glowing shell of ionized gas which is ejected from red giant stars late in their lives.