Astonomy Crossword
                              
                              
                              
                              
                              
                              
                              
                              
                              
                              
                              
                              
                              
                              
                              
                              
                              
                              
                              
                              
                              
                              
                              
                              
                              
 
 
Down: 1) A change in frequency of waves emitted by an object related to its movement2) The apparent change in position of an object when viewed from different positions 3) The relationship between apparent brightness, absolute brightness, and distance4) How bright an object actually is; for a star, how bright it appears from a standard distance6) An object, such as a star, whose absolute brightness is known Across: 4) How bright an object appears from a distance5) A could of gas and dust that gives rise to stars 7) The universe begun when a huge explosion occurred8) The earlier stage in the life cycle of a star9) The most numerous category of stars in the universe
 

 

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