Stargazing Crossword Puzzle

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Across
  1. 3. To move or travel around an object in a curved path. Earth orbits the Sun. The Moon orbits the Earth.
  2. 5. An imaginary line around which a sphere, like a planet, rotates
  3. 8. A group of stars humans observe in a pattern and give a name
  4. 10. A group of billions of stars. There are billions of galaxies in the universe.
Down
  1. 1. To turn on an axis
  2. 2. A constellation, or group of stars, that appears in the northern night sky. Its name means Great Bear. For thousands of years, various peoples on Earth have thought that these stars formed the shape of a bear
  3. 4. A group of seven bright stars in the shape of a dipper
  4. 6. The star that Earth and other planets orbit
  5. 7. One of the billions of galaxies that make up the universe. The sun is one of the billions of stars in the Milky Way galaxy.
  6. 9. A huge sphere of hydrogen and helium that radiates heat and light. The Sun is a star.