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Simple terms and definitions - Astrophysics
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- 1Term: StarDefinition: Celestial space that has great size and emit light as a source of light.
Example: The Sun, it is the closest star to Earth. - 2Term: PlanetDefinition: Celestial bodies that surround the star as the centre of the solar system. The planet can not produce its own light but can reflect light.
- 3Term: SatelliteDefinition: Objects that orbit around the planet that has its own circulation.
Example: The Moon is the Earth's natural satellite. - 4Term: CometDefinition: Celestial bodies that orbit the sun. Comets have orbits own orbit whose shape is oval. Commonly referred to as a comet comet because of its bright glowing gas and dust tail is very long.
- 5Term: MoonDefinition: The natural satellite of the earth, visible (chiefly at night) by reflected light from the sun.
- 6Term: GalaxyDefinition: A system of millions or billions of stars, together with gas and dust, held together by gravitational attraction.
- 7Term: QuasarDefinition: A massive and extremely remote celestial object, emitting exceptionally large amounts of energy, which typically has a starlike image in a telescope. It has been suggested that quasars contain massive black holes and may represent a stage in the evolution of some galaxies.
- 8Term: PulsarDefinition: A neutron star that emits rapid and periodic pulses of radiation. A neutron star is an extremely compact or dense ball of neutrons created from the central core of a star that collapsed under gravity during a supernova explosion.
- 9Term: Black holeDefinition: It is extremely luminous and cause a burst of radiation that often briefly outshines an entire galaxy, before fading from view over several weeks or months. During this interval a supernova can radiate as much energy as the Sun is expected to emit over its entire life span.
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- International Baccalaureate (Astrophysics) Physics Fichas sobre Simple terms and definitions - Astrophysics, creado por Edk277 el 07/01/2014.
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