the Earth's natural satellite, which orbits the Earth.

to move or travel around in an orbital or elliptical path.

the sun together with all of the planets and other bodies that revolve around it.

the gaseous envelope that surrounds the Earth; the air.

the science that deals with the material universe beyond the Earth's atmosphere.

a large system of stars held together by mutual gravitation and isolated from similar systems by vast regions of space.

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Outer Space

Science

Term	Definition
moon	the Earth's natural satellite, which orbits the Earth.
orbits	to move or travel around in an orbital or elliptical path.
solar system	the sun together with all of the planets and other bodies that revolve around it.
atmosphere	the gaseous envelope that surrounds the Earth; the air.
astronomy	the science that deals with the material universe beyond the Earth's atmosphere.
galaxy	a large system of stars held together by mutual gravitation and isolated from similar systems by vast regions of space.