Ralphie

Physics

3 September, 13:58

Which of the following describes a major role of gravity in star formation?

A.

Gravity causes an interstellar cloud fragment to expand rapidly until it is large enough to form a star at its center.

B.

Gravity compresses gases at the center of a solar nebula until temperatures are high enough for nuclear fusion to occur.

C.

The gravitational forces of planets push gases from their atmospheres to form a star at the solar system's center.

D.

Asteroids passing by a solar system are pulled in by planets' gravities to form a star at the center of the solar system.