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Science Vocabulary

  • Galaxy
  • a large group of stars, dust, gas and dark matter held together by gravity. They vary in size with some containing millions of stars while others could contain as many as a trillion. They can also form in different shapes such as elliptical galaxies and spiral galaxies

 

  • Stars
  • a huge, bright ball of burning gas that is held together by gravity. Stars contain mostly hydrogen as well as helium and smaller amounts of other elements. The Sun is the closest star to Earth

 

  • Comet
  • a relatively small solar system body that orbits the sun. When close enough to the Sun they display a visible coma (a fuzzy outline or atmosphere due to solar radiation) and sometimes a tail

 

  • Outer space
  • the void that exists between celestial bodies, including the Earth

 

  • Milky Way
  • a spiral galaxy where our Solar System and Earth are located

 

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