Astronomy ch.14 Crossword
                              
                              
                              
                              
                              
                              
                              
                              
                              
                              
                              
                              
                              
                              
                              
                              
                              
                              
                              
                              
                              
                              
                              
                              
                              
                              
                              
                              
 
 
Down: 1) the most common type of telescope3) a telescope thar uses a set of lenses to gather and focus light from distant objects5) showed that all objects in the universe attract each othe through gravitational force6) the time required for earth to rotate once on its axis7) the earth is the center at the universe8) one of the first people to use a telescope to observe obujects in space11) the point in the sky directly above the observer on earth13) the angle between an object in the sky and the horizon17) the sun is at the center of the universe Across: 2) annouceed that all of the planets revolve around the sun in elliptical orbits and that the sun is not in the exact center of the universe4) proved that other galaxies existed beyond the edge of the Milky Way 9) study of the universe10) time reqiured for the earth to orbit once around the sun12) a region of sky that contains a recognizable star pattern and that is used to describethe location of objects in space14) a division of the year that is based on the orbit of the moon around earth15) the distance that light travekls in one year; about 9.46 trillion kilometers16) the line where the sky and the earth appear to meet18) an instrument that collects electromagnetic radiation from the sky and concentrates it for better observation19) all of the frequencies or wavelenghts of electromagnetic radiation20) a telescope that uses a curved mirror to gather and focus light frim distant objects21) used large tools to make the most detailed astronomical observations22) detect radio waves
 

 

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