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8th Science U6 L1
definition | term |
---|---|
Space and all the matter and energy in it. | Universe |
A collection of stars, dust, and gas bound together by gravity. | Galaxy |
The sun and all of the planets and other bodies that travel around it. | Solar system |
A relatively large spherical body that orbits a star. | Planet |
A large celestial body that is composed of gas and that emits light; the sun nis a typical star | Star |
A large cloud of gas and dust in interstellar space; a region in space where stars are born. | Nebula |
The distance light travels in one year; about 9.46 trillion kilometers. | Light-ye.ar |