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Bellaire SCI8 Astronomy Chapter 2 Vocab

geocentric A description of the solar system in which all of the planets revolve around the earth.
heliocentric A description of the solar system in which all of the planets revolve around the sun.
ellipse An elongated circle, or oval shape; theshape of the planets' orit
inertia The tendacy of a moving object to continue in a straight line or a stationary object to reamain in place.
nuclear fusion The process by which hydrogen atoms join together to make helium;; making energy.
core The central part of the sun where, nuclear fusion occcurs.
photosphere The inner layer of the suns atmosphere.
chromospheres The middle layer of the suns atmosphere.
corona The outer layer of the suns atmoshpere.
solar wind A stream of elictrically charged particles produced by the suns corona.
sunspots A dark area of gas on the sun that is cooler than surrounding gases.
prominence A loop of gas that protrudes
solar flare An explosion of Hydrogen gas from the suns surface that occurs when loop in sunspots region suddenly connect.
gas giant The name given to the first four outer planets
comet A ball of ice and dust whose orbit is usually a long narrow ellipse.
asteroid Objects revolving around the sun that are too small and too numerous to be considered planets
asteroid belt The region of the solar system between th eorbits of mars and jupiter, where many asteroids are found.
meteroid A chunck of rock or dust in space.
meteor A streak of light in the sky produced by the burnig of a meteroid in earths atmoshpere.
meteorite A meteroid that has hit the earths surface.
extraterrestrial life Life that rises outside the earth.
terrestrial planet The name given to four inner planets.
retrograde rotation The spinning motion of a planet from east to west, opposite of the direction of the rotation of most planets and moons.
greenhouse effect The trapping of heat by the planets atmosphere.
Created by: kdewey