| A | B |
|---|
| revolution | the movement of an object around another object |
| orbit | the path of an object as it revolves around another object in space |
| latitude | is a measurement of distance from the equator expressed in degrees north or south |
| solstice | the 2 days of the year on which the noon sun is directly overhead at either 23.5degrees south or 23.5degrees north |
| equinox | the 2 days of the year on which neither hemisphere is tilted toward or away from the sun |
| vernal equinox | the day of the year that marks the beginning of spring in the northern hemisphere |
| autumnal equinox | it marks the beginning of fall in the northern hemisphere |
| umbra | the darkest part of the moons shadow |
| penumbra | the part of a shadow surrounding the darkest part of the shadow |
| lunar eclipse | the blocking of sunlight to the moon that occurs when earth is directly between the sun and moon |
| tides | the daily rise and fall of earths waters on shores |
| gravity | the attracted force between 2 objects |
| satellite | is any natural or artificial object that revolves around an object in space |
| geosynchronous orbits | the orbit of a satellite that revolves around earth at the same rate that the earth rotates |
| telescope | a device built to study distant objects by making them appear closer |
| craters | a round pit on the moons surface |
| maria | dark flat regions on the moons surface |
| astronomy | the study of the moon stars and other objects in space |
| rotation | the spinning motion of a planet about its axis |
| solar eclipse | the blocking of sunlight to earth that occurs the moon is between the sun and earth |
