Science 8.4 Crossword
               
               
               
               
               
               
               
               
               
               
               
 
 
Down: 1) a huge cloud of gas and dust in space that is the first stage of star formation2) a star that can no longer turn helium into carbon; it cools and shrinks becoming a very small dense3) the distance light travels in a year4) a star that has produced more energy than gravity can hold together and explodes Across: 5) an object whose gravity is so strong that light cannot escape6) any of the patterns formed by groups of stars in the night sky. To people in the past, these patterns looked like pictures of animals or people7) An object in space that produces its own energy including heat and light8) a collection of billions of stars
 

 

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