Unit 1 Astronomy Crossword

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Across
  1. 5. Energy from the Sun that is converted into thermal or electrical energy.
  2. 6. The center of mass of two or more celestial bodies that are orbiting around each other.
  3. 8. The belief that the Sun is the center of the universe.
  4. 10. Imaginary line around a planet that it rotates on
Down
  1. 1. The entirety of space, time, matter, and energy, including all planets, stars, galaxies, and other celestial bodies
  2. 2. The force of attraction between two objects due to their mass.
  3. 3. A celestial body that orbits around a star and is spherical
  4. 4. The belief that the Earth is the center of the universe.
  5. 7. The emission of energy as electromagnetic waves or as moving subatomic particles.
  6. 9. The amount of matter in an object.