Astronomy is a natural science that studies celestial objects and phenomena. It uses mathematics, physics, and chemistry to explain their origin and evolution.
Objects of interest include planets, moons, stars, nebulae, galaxies, meteoroids, asteroids, and comets.
Relevant phenomena include supernova explosions, gamma-ray bursts, quasars, blazars, pulsars, and cosmic microwave background radiation.
More generally, astronomy studies everything that originates beyond Earth’s atmosphere. Cosmology is a branch of astronomy that studies the universe as a whole.
Here are some Links to high-quality places that focus on this field of science:
Cosmology Astronomy Sky & Telescope
