| A | B |
|---|
| blue moon | 2 full moons in one month |
| Neil Armstrong | 1st to set foot on the moon |
| Edwin "Buzz" Aldrin | 2nd to set foot on the moon |
| Apollo 11 | First US space mission to the moon. July 20, 1969. |
| Sea of Tranquility | Landing site of Apollo 11. |
| Craters | circular indentations on the moon caused by meteorites. |
| Mare | Latin for "sea", are dark low areas on the moon created from lava flows. |
| The Big Whack | one dominating theory that explains how the moon formed 3-4 billion years ago from a Mars size planet that collided with earth. |
| 3500 km | Est. diameter of the moon. |
| 238,900 miles | Approx. distance from earth to the moon |
| Highlands | mountains on the moon |
| Mass | the amount of matter. The moon is one-sixth that of earth. |
| Gravity | Less mass means less gravity. You would weigh one-sixth as much on the moon as you do on earth. |
| 29.5 days | the amount of days it takes the moon to go from full moon to full moon |
| 1 rotation | How many times the moon spins in one month |
| counter-clockwise | The direction the moon orbits the earth. Also, is West to East. |
| Solar eclipse | Can only occur when the moon is between the sun and the earth. New Moon phase. |
| Lunar Eclipse | Can only occur when the earth is between the sun and the moon. Full moon phase. |
| Meteorites | asteroid/comet objects that hit the planet or moon |
| Phases of the moon | Caused by the varying positions and amount of reflected light, of the moon around earth, as a result we view the moon differently each day- Hence, phases. |
