| A | B |
|---|
| satellite | any natural or artificial object that revolves around an object in space |
| geosynchronous orbits | they revolve around earth at the same rate that earth rotates |
| telescope | the lenses focused the light coming through the tube making distant objects seem closer |
| craters | round pits on the moon |
| Axis | The imaginary line that passes through Earth`s center |
| Revolution | The movement of one object around another |
| Vernal Equinox | Spring Equinox |
| Astronomy | The study of the moon, the stars, and other objects in space |
| umbra | The darkest part of the moon's shadow. |
| solar eclipse | When the moon passes between earth and the sun |
| penumbra | moon casts another shadow that is less dark than the umbra. |
| lunar eclipse | occurs at a full moon when earth is directly between the moon and the sun |
| tides | the rise and fall of water |
| gravity | pulls the moon and earth towards each other |
| Orbit | Earth`s path as it revolves around the sun |
| Latitude | A measurement of distance from the equator |
| Solstice | The day when the noon sun is overhead at either 23.5 degrees south or 23.5 degrees north |
| Equinox | When the length of nighttime and daytime are the same |
| Autumnal Equinox | It marks the beginning of fall in the Northern Hemispere |
