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Astronomy, Part 1

For Mrs. Tejnecky.

Astronomy The branch of science that deals with celestial objects, space, and the physical universe as a whole.
Geocentric Measured from or considered in relation to the center of the earth.
Phases of the moon Waxing Crescent, First Quarter, Waxing Gibbous, Full Moon, Waning Gibbous, Third Quarter, Waning Crescent, New Moon
Heliocentric Measured from or considered in relation to the center of the sun.
Rotation The action of rotating around an axis or center.
Revolution A single orbit of one object around another or about an axis or center
Perihelion The point in the orbit of a planet, asteroid, or comet at which it is closest to the sun.
Aphelion The point in the orbit of a planet, asteroid, or comet at which it is furthest from the sun.
Solar Eclipse An eclipse in which the sun is obscured by the moon.
Lunar Eclipse An eclipse in which the moon appears darkened as it passes into the earth's shadow.
Terrestrial Planet A planet that is composed primarily of silicate rocks or metals.
Jovian Planet Any of the four large outer planets: Jupiter, Saturn, Uranus, and Neptune.
Asteroid A small rocky body orbiting the sun.
Comet A “tail” of gas and dust particles pointing away from the sun.
Meteriod A small body moving in the solar system that would become a meteor if it entered the earth's atmosphere.
Meteor A small body of matter from outer space that enters the earth's atmosphere, becoming incandescent as a result of friction and appearing as a streak of light.
Meteorite A meteor that survives its passage through the earth's atmosphere such that part of it strikes the ground.
Photon A particle representing a quantum of light or other electromagnetic radiation
Electromagnetic Spectrum The range of wavelengths or frequencies over which electromagnetic radiation extends.
Doppler Effect An increase (or decrease) in the frequency of sound, light, or other waves as the source and observer move toward (or away from) each other.
Refracting Telescope A telescope that uses a converging lens to collect light.
Reflecting Telescope A telescope in which a mirror is used to collect and focus light.
Radio Telescope An instrument used to detect radio emissions from the sky, whether from natural celestial objects or from artificial satellites.
Hubble Telescope The Hubble Space Telescope helps scientists understand the universe and how planets, stars and galaxies form.
Space Shuttle A rocket-launched spacecraft, able to land like an unpowered aircraft, used to make repeated journeys between the earth and earth orbit.
Created by: madisonbarden