Astronomy Crossword
                                                        
                                                        
                                                        
                                                        
                                                        
                                                        
                                                        
                                                        
                                                        
                                                        
                                                        
                                                        
                                                        
                                                        
                                                        
                                                        
                                                        
                                                        
                                                        
                                                        
                                                        
                                                        
                                                        
                                                        
                                                        
                                                        
                                                        
                                                        
 
 
Down: 2) projection of the Earth's equator into space4) when the Sun, Earth and Moon fall into a straight line5) The effect whereby the position or direction of an object appears to differ when viewed from different positions6) the distance that light can travel in one year (about 10 trillion kilometers)7) the different appearances and rising times of the moon over its cycle9) when Earth lies directly between the Sun and the Moon10) the galaxy cluster and superclusters all together12) where it appears that the planets are moving backwards (west to east)13) a star whose complete circle lies above our horizon15) the boundary between the Earth and the sky16) groups of galaxies with more than a few dozen members17) the degrees from which a plane is tilted relative to an ecliptic plane18) geocentric, attempts to explain retrograde motion with a loop-on-loop setup20) the Earth's daily spin21) total lunar eclipse, partial lunar eclipse, penumbral lunar eclipse22) we always see the same phase of the moon, because Earth's gravity forces the same side of the moon to show24) an imaginary half circle stretching from the horizon due south, through the zenith, to the horizon due north26) the angle as it appears to span in your field of view28) great island of stars in space31) when the Moon lies directly between the Sun and Earth, so the Moon's shadow falls on Earth Across: 1) the Earth's orbital path, a defined flat plane3) the point directly overhead8) the planets move in this shape11) the process in which lightweight atomic nuclei smash together and stick to make heavier nuclei14) the Earth's yearly revolution19) a gradual wobble that alters the orientation of Earth's axis in space23) total solar eclipse, partial solar eclipse, annular eclipse25) consists of the Sun and all the objects that orbit it27) when our universe's expansion began29) the Earth's average orbital distance (150 kilometers)30) the sky as seen from wherever you happen to be standing32) another word for azimuth33) places Earth at the center of the universe34) a sort of "skin" of stars wrapping around Earth35) how high a star is in the sky relative to the horizon36) spurred by the new ideas introduced by the Polish scientist, eventually overturned the Earth-centered model37) the path the Sun follows as it appears to circle around the celestial sphere once each year38) clusters of galaxy clusters
 

 

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