If a star is in hydrostatic equilibrium
A) it is in a stable binary orbit.
B) it is generating energy at the same rate everywhere.
C) it is near the end of its life.
D) it must be losing mass.
E) its radiation pressure outwards and gravitational forces inwards are in balance.

Question

Quizplus · Accepted Answer

Hydrostatic equilibrium in a star means that the outward pressure from radiation and gas is balanced by the inward pull of gravity, maintaining the star's stability.

If a Star Is in Hydrostatic Equilibrium