Space Dictionary

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Across
  1. 2. when scientists used it to refer to the band of colors formed by a beam of light like a rainbow.
  2. 4. a star that ejects some of its material in the form of a cloud and become more luminous in the process
  3. 6. the theory that the universe originated sometime between 10 billion and 20 billion years ago from the explosion of a small volume of matter.
  4. 7. is the natural force that causes things to fall toward the earth.The force of attraction between all masses in the universe.
  5. 8. is sometimes the birthplace of stars.
Down
  1. 1. a system of two stars that revolve around
  2. 2. instrument designed to observe the spectrum in stars
  3. 3. the galaxy containing the solar system;consists of millions of stars that can be seen as a diffuse band of light stretching across the night sky.
  4. 5. a group of stars that forms a pattern and has been given a name based on its shape.