a model of he universe of which Earth is at the center of the revolving planets and stars
a model of the solar system in which Earth and the other planets revolve around the Sun
an oval shape, which elongated or nearly circular. the shape of the planets orbits.
the tendency of an object to resist a change in motion
a force that moves rocks and other materials downhill; the force that pulls objects toward each other
the name often given to the four inner planets :mercury, Venus, earth.
the direction opposite of the movement of something else, and is the contrary of direct or prograde motion
the process by which heat is trapped in the atmosphere by water vapor carbon, dioxide, methane, and other gases that form a blanket around earth the trapping of heat by a planets atmosphere
the process in which heat is trapped in the atmosphere by water vapor. carbon, dioxide, methane and other gases that form a blanket around earth. the trapping of heat by a planets atmosphere
the name often given to the first four outer planets, Jupiter, Saturn, Uranus and Neptune
rocky objects revolving around the sunhat are too small and numerous to be considered planets
the region of the solar system between the orbits of mars and Jupiter where many asteroids are found
a chuck of rock or dust in space
a streak of light in the sky produced by the burning meteoroid in the earth's atmosphere
a meteoroid that passes through the atmosphere and hits the earth's surface