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earth in space

rotation the action of rotating around an axis or center
revolution is a fundamental change in political power
orbit Image result for orbiten.wikipedia.org In physics, an orbit is the gravitationally curved path of an object about a point in space, for example the orbit
geocentric theory In astronomy, the geocentric model (also known as geocentrism,
Heliocntric theory Image result for heliocentric theory This theory was first proposed by Nicolaus Copernicus. Copernicus was a Polish astronomer. He first published the heliocentric
astrnomy the branch of science that deals with celestial objects, space, and the physical universe as a whole.
solar sytem Image result for solar systemsolarviews.com Our solar system consists of an average star we call the Sun,
telescope . an optical instrument designed to make distant objects appear nearer, containing an arrangement of lenses, or of curved mirrors and lenses
comet a celestial object consisting of a nucleus of ice and dust and, when near the sun, a “tail” of gas and dust particles pointing away from the sun
gravity the force that attracts a body toward the center of the earth, or toward any other physical body having mass. For most purposes Newton's laws of gravity apply, with minor modifications to take the general theory of relativity into account.
astronomer an expert in or student of astronomy
nasa Image result for nasa definition The National Aeronautics and Space Administration
axis an imaginary line about which a body rotates.
tilt move or cause to move into a sloping position.
meteors 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.
constellation a group of stars forming a recognizable pattern that is traditionally named after its apparent form or identified with a mythological figure. Modern astronomers divide the sky into eighty-eight constellations with defined boundaries.
Created by: 1965079868