What are key terms to remember in Astronomy?

Planet: a large, round, astronomical body that orbits a star and does not produce its own light.

Star: a large, bright, hot ball of gas that produces its own light.

Constellation: a group of stars that appear in the sky in the same pattern and are named after creatures, characters, and objects.

Solar System: a collection of planets and other objects that orbit around a single star.

Galaxy: a large collection of stars, dust, and gas held together by gravity.

Light-year: a unit of measurement used to measure distances in space, equal to the distance light travels in one year.

Nebula: a cloud of gas and dust in outer space.

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