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7 Cards in this Set

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  • Back
What is the rate at which velocity changes with time?
Acceleration
The point at which a planet moves most slowly when it is farthest from the sun is known as what?
Aphelion
The unit of length, used by astronomers, which is the average distance between the Earth and the Sun is called what?
astronomical unit
What is the abbreviation for astronomical unit?
AU
The alignment of two bodies in the solar system so that they appear in the same part of the sky as seen from Earth is known as what?
conjuction
When Mars is located behind the Sun, as seen from Earth, it is said to be in what?
conjuction
The study of formation, organization, and evolution of the universe is called what?
cosmology