What Happens to the Outer Layers of a Low-Mass Star

question 217

Multiple Choice

What happens to the outer layers of a low-mass star after the helium core and shell fusion stages are completed?

• A) The star stabilizes at the size of a red giant star, radiation pressure from below balancing gravity from the core, and slowly cools for the rest of its life.
• B) The outer layers are spun off into space to make a spiral structure known as a spiral galaxy.
• C) The outer layers are propelled slowly away from the core to form a planetary nebula.
• D) The star contracts back onto the core and becomes hot enough to undergo further hydrogen fusion, leading to a very hot and active, white dwarf star.

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