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13 Cards in this Set

  • Front
  • Back
Big Bang
The initial explosion that resulted in the formation and expansion of the universe.
Equinox
The two days of the year on which neither hemispher 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 two 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 on the sun.