Saturn Rings Solar System Unit B Nasa Photojournal

Unit Objectives

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Vocabulary

axis
The imaginary line on which an object rotates.
comet
A small object in space, made of ice, dust, gas, and rock, that orbits a star and that can form a gaseous tail.
constellation
A group of stars that form a fixed pattern in the night sky.
meteorite
The remaining material of a meteor that has landed on the ground.
meteor
A piece of rock or metal from space that enters Earth's atmosphere.
planet
A large body in space that orbits a star and does not produce light on its own.
reflecting telescope
An instrument for viewing distant objects that uses a curved mirror at the back of its tube to gather light and produce an image.
refracting telescope
An instrument for viewing distant objects that uses two lenses to gather light and produce an image.
revolution
The movement of an object around another object or point.
rotation
The spinning motion of an object on its axis.
star
A huge object in space, made up of hot gases, that shines by it own light.

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