Astronomy Crossword
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
 
 
Down: 1) we always see the same phase of the moon, because Earth's gravity forces the same side of the moon to show2) places Earth at the center of the universe4) the boundary between the Earth and the sky6) a star whose complete circle lies above our horizon7) when Earth lies directly between the Sun and the Moon8) a gradual wobble that alters the orientation of Earth's axis in space9) projection of the Earth's equator into space10) when our universe's expansion began11) total solar eclipse, partial solar eclipse, annular eclipse12) the point directly overhead13) when the Sun, Earth and Moon fall into a straight line14) clusters of galaxy clusters21) the degrees from which a plane is tilted relative to an ecliptic plane23) the Earth's daily spin24) another word for azimuth29) an imaginary half circle stretching from the horizon due south, through the zenith, to the horizon due north32) the Earth's yearly revolution33) the sky as seen from wherever you happen to be standing34) the planets move in this shape Across: 3) a sort of "skin" of stars wrapping around Earth5) the angle as it appears to span in your field of view15) the process in which lightweight atomic nuclei smash together and stick to make heavier nuclei16) total lunar eclipse, partial lunar eclipse, penumbral lunar eclipse17) the galaxy cluster and superclusters all together18) the Earth's orbital path, a defined flat plane19) the distance that light can travel in one year (about 10 trillion kilometers)20) consists of the Sun and all the objects that orbit it22) the path the Sun follows as it appears to circle around the celestial sphere once each year25) geocentric, attempts to explain retrograde motion with a loop-on-loop setup26) when the Moon lies directly between the Sun and Earth, so the Moon's shadow falls on Earth27) the different appearances and rising times of the moon over its cycle28) groups of galaxies with more than a few dozen members30) where it appears that the planets are moving backwards (west to east)31) the Earth's average orbital distance (150 kilometers)35) spurred by the new ideas introduced by the Polish scientist, eventually overturned the Earth-centered model36) how high a star is in the sky relative to the horizon37) The effect whereby the position or direction of an object appears to differ when viewed from different positions38) great island of stars in space
 

 

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