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26 Cards in this Set

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planet (def)
any of the eight large heavenly bodies revolving about the sun and shining by reflected light; a similar body revolving about a star other than the sun.
planets (names)
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune
star
large, self-luminous, heavenly body; our sun
asteroid belt
the region of space between the orbits of Mars and Jupiter in which most asteroids are located
asteroid
small, celestial body revolving around the sun
meteor
a meteoroid that has entered the earth's atmosphere
meteoroid
small body moving in space, usually smaller than an asteroid; usually pieces of comets
meteorite
mass of stone or metal that reaches the earth; a fallen meteoroid
orbit
a curved path of a planet (or satellite) as it moves around another heavenly body, e.g., the sun
satellite (1)
a heavenly body that revolves around a planet; a moon
satellite (2)
an object launched to orbit earth or other heavenly body
retrograde orbit
an orbit in backward motion
revolution
turning around or rotating; the motion of one heavenly body around another
axis
a central point around which something turns; earth's axis
comet
a celestial body moving around the sun, consisting of a central mass surrounded by an envelope of dust and gas that may form a tail that streams away from the sun.
shooting star
meteor; bright trail or streak
Mars
4th planet from the sun; has 2 moons
Jupiter
5th planet from the sun; has 14+ moons; largest planet
Saturn
6th planet from the sun; has 21 moons; second largest planet
Uranus
7th planet from the sun; has 15 moons
Neptune
8th planet from the sun; has 2 moons
Mercury
planet nearest to the sun; smallest planet
Venus
2nd planet from the sun; brightest planet
Earth
3rd planet from the sun; 1 moon
Titan
one of Saturn's moons
aurora
atmospheric phenomenon caused by charged particles from the solar wind; northern and southern lights