Question

What physical process provides the energy for the ejection of a planetary nebula from a low-mass star?

A) transfer of hydrogen-rich material onto the surface of a white dwarf from its companion in a binary star system
B) helium shell flashes in the helium fusion shell
C) core collapse and the ensuing shock wave
D) collision with another star

Answer 1

The ejection of a planetary nebula from a low-mass star is caused by mass loss from red-giant stars.

Step-by-step explanation:

The physical process that provides the energy for the ejection of a planetary nebula from a low-mass star is the mass loss from red-giant stars. As stars become red giants, they lose a substantial fraction of their mass into space through radiation pressure, stellar pulsations, and violent events like the helium flash. This mass loss causes the star to shed its outer layers, exposing hot inner layers and creating a planetary nebula.