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Unit 3

Science Unit 3 Vocabulary definitions #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 in there
Astronomy The study of space
Astronomer The person who studies space
Telescope An instrument used to study objects in the far distance
Nebula A could 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 oceans.
Satellite Anything that orbits another object
Craters indentations caused by rocks or comets crashing into the moon
Popular Science sets

 

 



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