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Astronomy definitions for Stark County Jr. High

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definition
Vocabulary word
the distance that light travels in a year   light year  
study of the universe   astronomy  
when the moon blocks the sun's light over a part of earth   solar eclipse  
the brightness of a star as viewed from Earth   apparent magnitude  
third rock from the sun   Earth  
a large body that revolves around a star   planet  
a pattern of stars in the sky   constellation  
a hot rotating ball of hydrogen and helium gases that creates its own light through nuclear fusion reactions   star  
billions of stars held together by gravity   galaxy  
huge clouds of gas and dust where the stars and planets are born   nebulas  
a small object made up of ice, frozen gas and dust (dirty snowball) that orbits the sun   comet  
the measure of a star's true brightness   absolute magnitude  
source of huge amounts of energy in form of radio waves   quasar  
the band of constellations through which the sun appears to pass through the year   zodiac  
when the earth's shadow falls across the moon   lunar eclipse  
family of planets and moons that revolves around a star   solar system  
a tiny bit of metal and rock from a comet that travels through space   meteoroid  
a natural satellite of a planet   moon  
the force that attracts objects to each other   gravity  
an area of cooler temperatures on the sun where magnetic activity occurs   sunspot  


   


 

 

 

 

 

 
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