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11 Cards in this Set

  • Front
  • Back
Sun
A star that is at the center of the solar system.
galaxy
a group of many stars
planet
a ball of rock or gas that moves around a star.
solid
having a definite, firm shape and volume.
liquid
a substance that takes on the shape of the container it is in.
moon
a ball of rock that moves around a planet.
gas
a form of matter that can expand to fill a container and take the shape of the container.
Milky Way
the galaxy of which our solar system is part.
star
an enormous ball of burning gas.
Universe
everything that exists in space.
Solar System
A sun plus the planets that move around it.