Astronomy-Scholarly Journal
Astronomy is the experimental study of all objects in space. The word reaches to us from the ancient Greek term for "star law." Astrophysics, which is part of astronomy, goes a step expedite and applies the laws of
physics to gain knowledge from the sources of the universe and the objects in it. Both professional and amateur astronomers monitor the universe and concoct theories and applications to help perceive the planets, stars, and galaxies. A central undertaking in astronomy is the determination of distances. Without any knowledge of astronomical distances, the size of an observed object in space would remain nothing more than an angular diameter and the brightness of a star could not be converted into its true radiated power, or luminosity. Astronomical distance measurement began with knowledge of Earth’s diameter, which provided a base for triangulation. Astronomy is one of the oldest natural sciences. The early civilizations in recorded
history made methodical observations of the night sky. These include the Babylonians, Greeks, Indians, Egyptians, Chinese, Maya, and many ancient indigenous peoples of the Americas. In the past, astronomy included disciplines as diverse as astrometry, celestial navigation, observational astronomy, and the making of calendars. Nowadays, professional astronomy is often said to be the same as astrophysics.
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