1
The movement of one object around another
2
A device built to observe distant objects by making them appear closer
3
An object that revolves around another object in space
4
A chunk of rock or dust in space
5
The two days of the year on which the sun reaches its greatest distance north or south of the equator
6
speed in a given direction
7
The _______ is the less dark and larger part of the moon\'s shadow cast during a solar eclipse.
8
The spinning of Earth on it\'s axis
9
A rocket must achieve ___________ velocity to establish an orbit around a body in space.
10
Newton\'s 1st Law of Motion explains ________.
11
A spacecraft that can carry a crew into space, return to Earth, and then be reused for the same purpose
12
The partial or total blocking of one object in space by another
13
A space ________ is an large artificial satellite on which people can live and work for long periods.
14
The two days of the year on which neither hemisphere is tilted toward or away from the sun
15
The force of gravity on an object
16
One of the different apparent shapes of the moon as seen from Earth
17
The _____ tide occurs during the new and full moons.
18
The reaction force that propels a rocket forward
19
A rocket must reach _______ velocity to fly beyond a planet’s or moon’s gravitational pull.
20
A _______ eclipse occurs when the moon blocks the sunlight from reaching the Earth.
21
A large round pit caused by the impact of a meteoroid
22
A device that expels gas in one direction to move in the opposite direction
23
A _______ eclipse occurs when Earth blocks sunlight from reaching the moon.
24
A spacecraft that has various scientific instruments that can collect data, including visual images, but has no human crew
25
A small robotic space probe that can move about the surface of a planet or moon
26
Dark, flat areas on the moon’s surface formed from huge ancient lava flows.
27
The path an object follows as it revolves around another
28
The very darkest part of the moon\'s shadow during a solar eclipse
29
The amount of matter in an object
30
The ____ tide occurs when the moon\'s gravitational pull is at a right angle to the sun\'s pull.
