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Stars, Galaxies, and the Universe

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Question
Answer
show A DEVICE BUILT TO OBSERVE DISTANT OBJECTS BY MAKING THEM APPEAR CLOSER  
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show ELECTROMAGNETIC WAVES THAT ARE VISIBLE TO THE HUMAN EYE  
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show THE DISTANCE BETWEEN THE CREST OF ONE WAVE TO THE CREST OF THE NEXT WAVE  
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show THE RANGE OF WAVELENGTHS OF ELECTROMAGNETIC WAVES  
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OPTICAL TELESCOPE   show
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ELECTROMAGNETIC RADIATION   show
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REFRACTING TELESCOPE   show
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show A PIECE OF TRANSPARENT GLASS CURVED SO THAT THE MIDDLE IS THICKER THAN THE EDGES  
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show A TELESCOPE THAT USES A CURVED MIRROR TO COLLECT AND FOCUS LIGHT  
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RADIO TELESCOPE   show
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show A BUILDING THAT CONTAINS ONE OR MORE TELESCOPES  
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show AN IMAGINARY PATTERN OF STARS IN THE SKY  
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SPECTROGRAPH   show
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APPARENT BRIGHTNESS   show
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show THE BRIGHTNESS A STAR WOULD HAVE IF IT WERE A STANDARD DISTANCE FROM EARTH  
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show THE DISTANCE LIGHT TRAVELS IN ONE YEAR  
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PARALLAX   show
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show A GRAPH RELATING THE SURFACE TEMPERATURES AND ABSOLUTE BRIGHTNESSES OF STARS  
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show A DIAGONAL AREA ON AN H-R DIAGRAM THAT INCLUDES MORE THAN 90% OF ALL STARS  
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NEBULA   show
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PROTOSTAR   show
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WHITE DWARF   show
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show AN EXPLOSION OF A MASSIVE STAR  
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NEUTRON STAR   show
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show A RAPIDLY SPINNING NEUTRON STAR THAT PRODUCES RADIO WAVES  
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BLACK HOLE   show
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show A STAR SYSTEM WITH TWO STARS  
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show A BINARY STAR SYSTEM IN WHICH ONE STAR PERIODICALLY BLOCKS THE LIGHT FROM THE OTHER  
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show A STAR CLUSTER THAT HAS A LOOSE, DISORGANIZED APPEARANCE AND CONTAINS NO MORE THAN A FEW THOUSAND STARS  
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show A LARGE, ROUND, DENSELY-PACKED GROUPING OF OLDER STARS  
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GALAXY   show
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show A GALAXY WITH A BULGE IN THE MIDDLE AND ARMS THAT SPIRAL OUTWARD IN A PINWHEEL PATTERN  
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ELLIPTICAL GALAXY   show
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show A GALAXY THAT DOES NOT HAVE A REGULAR SHAPE  
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show AN ENORMOUSLY BRIGHT, DISTANT GALAXY WITH A GIANT BLACK HOLE AT ITS CENTER  
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UNIVERSE   show
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SCIENTIFIC NOTATION   show
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show THE INITIAL EXPLOSION THAT RESULTED IN THE FORMATION AND EXPANSION OF THE UNIVERSE  
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HUBBLE'S LAW   show
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show THE ELECTROMAGNETIC RADIATION LEFT OVER FROM THE BIG BANG  
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show A LARGE CLOUD OF GAS AND DUST, SUCH AS THE ONE THAT FORMED OUR SOLAR SYSTEM  
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PLANETESIMAL   show
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DARK MATTER   show
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DARK ENERGY   show
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Created by: bwise
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