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Astronomy
5th Grade Vocabulary for Astronomy Unit
Term | Definition |
---|---|
gravity | force that pulls objects toward each other |
constellation | group of stars that form a recognizable pattern in the sky |
solar system | system of objects in space that includes at least one star, planets, their moons, asteroids, comets, and other space debris |
orbit | path an object follows in space around another object |
galaxy | big collection of dust, gas, stars, and their solar systems |
universe | everything in space |
axis | imaginary line that goes through the center of an object |
star | a space object that gives off its own heat and light |
apparent brightness | how bright a start looks from Earth |
absolute brightness | how bright a star really is |
rotation | to spin on an axis |
reflect | to bounce back light |
solar eclipse | an event during which the moon's shadow blocks all or some of the sun's light |