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Science Unit 3 Vocab

Def #1

TermDefinition
Galaxy A huge system of stars, dust and gas that is held together by gravity.
Supernova An explosion that is billions of times brighter than a star.
Stars gigantic balls of very hot gases that give off electromagnetic radiation.
Black hole A point in space with a gravitational field so strong not even light can escape.
Light year The distance that light travels in one year.
Eclipse Anything that blocks the Sun's light.
Solar Eclipse when the moon blocks the Sun's light.
Lunar Eclipse when the Earth casts a shadow on the Moon.
Constellation An area in the sky and all of the stars located there.
Astronomy The study of space.
Astronomer The person who studies space.
Telescope An instrument used to study objects in far distances.
Nebula A cloud of gas and dust where a new star is formed.
Milky Way The name of the galaxy our solar system is located.
Sun The star that is the center of our solar system.
Magnitude the brightness of a star
Moon Earth has one natural satellite.
Low tide is when a 1st or 3rd quarter moon and sun form a 90-degree angle and exert gravity on Earth's ocean.
Satellite Anything that orbits another object.
Craters indentations caused by rocks or comets crashing into the moon.
Created by: Irene A
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