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16 Cards in this Set

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  • Back
solar system
a group of planets and their moons that orbit a star
telescope
a device used to observe distant objects
inner planets
the four planets closest to the sun
star
a burning ball of gasses
rotation
spin, it takes Earth 24 hours to make one rotation
phases
the different shapes of the lit side of the moon
gas giants
four of the outer planets that are made up mainly of gasses
revolution
one complete trip of one object around another object
axis
the imaginary line on which a planet rotates
orbit
the path that a planet takes around the sun
asteroid
a rocky object that orbits the sun between Mars and Jupiter
satellite
an object that orbits another object
outer planets
the five planets that are on the outer side of the asteroid
planet
a large object that orbits a star
comet
an object made up of ice, dust, and gasses that orbits our sun
space probe
a space vehicle that is sent into space to explore places too far away for people to visit