From Big Bang to Big Questions: Unraveling the Universe with Modern Astronomy | Earth Science

This video introduces modern astronomy. Part one of three, this video introduces the observational and interpretational science of astronomy, also introduces the models and laws used, as well as an introduction to the Moon phases.

Astronomy (from Greek: ἀστρονομία, literally meaning the science that studies the laws of the stars) 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 that studies the universe as a whole.

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