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12 Cards in this Set

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Equinox
The two days of the year on which neither hemisphere is tilted toward or away from the sun
Gas Giants
The name given to the first four outer planets: Jupiter, Saturn, Uranus, and Neptune
Gravity
The attractive force between two objects; its magnitude depends on their masses and the distance between them
Orbit
The path of an object as it revolves around another object in space
Prominence
A loop of gas that protrudes from the sun's surface, linking parts of sunspot regions
Retrograde rotation
The spinning motion of a planet from east to west, opposite to the direction of rotation of most planets and moons
Revolution
The movement of an object around another object
Rotation
The spinning motion of a planet about its axis
Satellite
Any object that revolves around another object in space
Solar eclipse
The blocking of sunlight to Earth that occurs when the moon is between the sun and Earth
Solstice
The 2 days of the year on which the noon sun is directly overhead at either 23.5 degrees South or 23.5 degrees North
Sunspots
Dark, cooler regions on the surface of the sun