Astronomy Crossword

Study of all things outside of earth
The tilt an object rotates on
A circular movement of an object around a center
the movement of one object around a center or another object
When an object revolves around another object
When the sun reaches its highest point in the sky at noon, marked by the shortest and longest days
When the sun passes the celestial equator
The shape of the illuminated moon from earth's perspective
The force that pulls an object of mass down to earth
The theory that the universe started with a 'big bang'
Everything outside of earth
A system of stars, planets, dust, and gas, all held together with gravity
The distance light travels in a year
Sir Isaac Newton's first law of motion
A planet whose orbit stays within the asteroid belt
Region of complete shadow caused by blocked light
Point of moon's orbit where it is closest to earth
Point of moon's orbit where it is the farthest from earth
Time for earth to make a complete rotation on its axis
Group of stars clustered together to make a shape