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[[File:Crab Nebula.jpg|thumb|right|300px|CRab Nebula]] | [[File:Crab Nebula.jpg|thumb|right|300px|CRab Nebula]] | ||
[[Astronomy]] is a natural science that deals with the study of celestial objects (such as stars, [[planet]]s, [[ | [[Astronomy]] is a natural science that deals with the study of celestial objects (such as stars, [[planet]]s, [[comet]]s, [[Nebula|nebulae]], star clusters and galaxies) and phenomena that originate outside the [[Earth]]'s atmosphere (such as the cosmic background radiation). It is concerned with the evolution, physics, chemistry, meteorology, and motion of celestial objects, as well as the formation and development of the universe. | ||
Astronomy is one of the oldest sciences. Prehistoric cultures left behind astronomical artifacts such as the [[Egypt]]ian monuments and Stonehenge, and early civilizations such as the Babylonians, Greeks, Chinese, and Indians performed methodical observations of the night sky. However, the invention of the telescope was required before astronomy was able to develop into a modern science. Historically, astronomy has included disciplines as diverse as astrometry, celestial navigation, observational astronomy, the making of calendars, and even astrology, but professional astronomy is nowadays often considered to be synonymous with astrophysics. | Astronomy is one of the oldest sciences. Prehistoric cultures left behind astronomical artifacts such as the [[Egypt]]ian monuments and Stonehenge, and early civilizations such as the Babylonians, Greeks, Chinese, and Indians performed methodical observations of the night sky. However, the invention of the telescope was required before astronomy was able to develop into a modern science. Historically, astronomy has included disciplines as diverse as astrometry, celestial navigation, observational astronomy, the making of calendars, and even astrology, but professional astronomy is nowadays often considered to be synonymous with astrophysics. |