Vocabulary Flashcards
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Asteroid
Small rocky object orbiting the sun
Comet
Celestial object with nucleus of ice and dust with a tail facing away from sun
Constellation
A group of stars forming a distinctive pattern
Light-year
The distance light travels in 1 year (9.5 trillion km/9.5x10 to the power of 12)
Meteor
When meteoroids enter a planet’s atmosphere and completely burns up.
Meteorite
When a meteoroid survives the trip through the atmosphere and hits the ground, its a meteorite.
Meteoroid
Broken pieces of asteroids and comets moving through space
Penumbra
Outer shadow of an eclipse, lighter, partial shadow
Revolution
Orbiting (spinning) around a second object (in the solar system, it’s like the Earth around the Sun or the Moon around the Earth.)
Rotation
Spinning on its own axis
Umbra
Inner shadow of an eclipse, darker, total shadow