Astronomy

The Moon is Earth’s only natural satellite, a rocky world whose orbit, surface, and geological history illuminate the evolution of the Earth–Moon system.

The Solar System comprises the Sun and its gravitationally bound planets, moons, smaller bodies, and interplanetary material.

The Sun is the hydrogen-fusing star at the center of the Solar System and the principal source of energy for Earth’s surface.

A white dwarf is a dense stellar remnant supported by electron degeneracy pressure that usually shines by gradually releasing stored heat.