![]() ![]() This data is then analyzed using basic principles of physics. Observational astronomy is focused on acquiring data from observations of astronomical objects. Professional astronomy is split into observational and theoretical branches. In the past, astronomy included disciplines as diverse as astrometry, celestial navigation, observational astronomy, and the making of calendars. These include the Egyptians, Babylonians, Greeks, Indians, Chinese, Maya, and many ancient indigenous peoples of the Americas. ![]() The early civilizations in recorded history made methodical observations of the night sky. Cosmology is a branch of astronomy that studies the universe as a whole.Īstronomy is one of the oldest natural sciences. More generally, astronomy studies everything that originates beyond Earth's atmosphere. Relevant phenomena include supernova explosions, gamma ray bursts, quasars, blazars, pulsars, and cosmic microwave background radiation. Objects of interest include planets, moons, stars, nebulae, galaxies, meteoroids, asteroids, and comets. It uses mathematics, physics, and chemistry in order to explain their origin and their overall evolution. The Paranal Observatory of European Southern Observatory shooting a laser guide star to the Galactic CenterĪstronomy is a natural science that studies celestial objects and the phenomena that occur in the cosmos. Not to be confused with astrology, a pseudoscience. ![]()
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