Astronomy Crossword
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
 
 
Down: 1) places Earth at the center of the universe2) the process in which lightweight atomic nuclei smash together and stick to make heavier nuclei4) geocentric, attempts to explain retrograde motion with a loop-on-loop setup6) the different appearances and rising times of the moon over its cycle8) where it appears that the planets are moving backwards (west to east)10) the Earth's orbital path, a defined flat plane11) the Earth's average orbital distance (150 kilometers)14) The effect whereby the position or direction of an object appears to differ when viewed from different positions15) the distance that light can travel in one year (about 10 trillion kilometers)18) when the Sun, Earth and Moon fall into a straight line19) consists of the Sun and all the objects that orbit it22) an imaginary half circle stretching from the horizon due south, through the zenith, to the horizon due north23) great island of stars in space26) how high a star is in the sky relative to the horizon27) a gradual wobble that alters the orientation of Earth's axis in space32) the Earth's daily spin Across: 3) clusters of galaxy clusters5) the sky as seen from wherever you happen to be standing7) another word for azimuth9) total solar eclipse, partial solar eclipse, annular eclipse12) a star whose complete circle lies above our horizon13) total lunar eclipse, partial lunar eclipse, penumbral lunar eclipse16) the point directly overhead17) when the Moon lies directly between the Sun and Earth, so the Moon's shadow falls on Earth20) we always see the same phase of the moon, because Earth's gravity forces the same side of the moon to show21) the path the Sun follows as it appears to circle around the celestial sphere once each year23) groups of galaxies with more than a few dozen members24) the planets move in this shape25) a sort of "skin" of stars wrapping around Earth28) when our universe's expansion began29) the galaxy cluster and superclusters all together30) the angle as it appears to span in your field of view31) projection of the Earth's equator into space33) when Earth lies directly between the Sun and the Moon34) the degrees from which a plane is tilted relative to an ecliptic plane35) the Earth's yearly revolution36) the boundary between the Earth and the sky37) spurred by the new ideas introduced by the Polish scientist, eventually overturned the Earth-centered model
 

 

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