During a star's main sequence portion of its life it does not change size appreciably. This observation indicates that
A) the Sun produces more energy than it radiates into space.
B) the Sun produces less energy than it radiates into space.
C) the Sun produces about the same amount of energy as it radiates into space.

Question

Quizplus · Accepted Answer

During the main sequence, a star is in hydrostatic equilibrium, meaning the energy produced in its core is balanced by the energy radiated into space, maintaining a stable size.

During a Star's Main Sequence Portion of Its Life It