Astronomy science and information of astronomy
Astronomy Astronomy (from Greek : ἀστρονομία ) is a natural science that studies celestial objects and phenomena . It uses mathematics , physics , and chemistry in order to explain their origin and evolution . Objects of interest include planets , moons , stars , nebulae , galaxies , 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 outside Earth's atmosphere . Cosmology is a branch of astronomy. It studies the Universe as a whole. [1] Astronom...