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10 Cards in this Set

  • Front
  • Back
solar system
composed of:
the sun
planets
other bodies that travel around the sun
nebula
dust and gas clump together in huge interstellar clouds
solar nebula
the name of the nebula that formed into our own solar system
planetismal
bits of dust within the solar nebula stuck together when they collided, forming the tiny building blocks of the planets
rotation
the Earth's spinning on it's axis
revolution
the motion around the sun along it's orbit
orbit
the Earth also travels around the sun in a path
period of revolution
the amount of time it takes for a single trip around the sun
ellipse
a closed curve in which the sum of the distances from the edge of the curve of two points
astronomical unit
the average distance between Earth and the sun