solar, comets, astronomy, sun, plaents, satellites; astroids

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Across
  1. 1. Objects made of ice and dust that travel through space.
  2. 3. The scientific study of space and stars.
  3. 5. Large bodies that orbit the Sun.
  4. 7. Small rocky objects that orbit the Sun.
Down
  1. 2. The star at the center of our solar system.
  2. 4. system A system that includes the Sun and all planets.
  3. 6. Objects that move around planets.