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earth-science review

7th grade final

geocentric the discredited theory of the arrangement of the solar system that places the earth at the center with the sun and the planets orbiting the earth
heliocentric any theory of the arrangement of the solar system that places the sun and the center with the earth and the other planets in orbit around it
inertia the tendency of all objects in the universe to remain at rest if initially at rest if moving, to continue moving at the same speed and in the same direction unless acted upon by some outside force
ecliptical the apparent path of the sun among the stars also it is the plane of the earth's orbit
equinox either of two days during a year when the sun's noon position is directly above the equator
Milky Way the galaxy that contains our solar system
wavelengths the horizontal distance from one wave crest to the next wave crest
magnitude measure of the brightness of a star a measure of the amount of energy released by an earthquake
refractor a telescope that uses only lenses to concentrate the light from an object and focus it into an image
Hubble Space Telescope an astronomical reflecting telescope placed in Earth orbit by the space shuttle in 1990. The HST has provided amazing images of the universe that have changed the course of astronomy
composite a telescope that uses both a primary mirror and a large objective corrective lens as the main light-gathering elements of t6he telescope
galaxy resolution
Created by: kbenaske