Gravity Grid: Explore the Universe

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Across
  1. 4. The path an object takes around a star, planet, or moon
  2. 5. The closest planet to the Sun
  3. 8. Big balls of frozen gas, dust, and rock orbiting the Sun
  4. 11. Covers 70% of Earth’s surface
  5. 12. Now called a dwarf planet
  6. 13. Our solar system is part of this galaxy
  7. 14. The collection of 8 planets and their moons orbiting the Sun
Down
  1. 1. The branch of science dealing with celestial objects and space
  2. 2. Layer of gas that surrounds a planet
  3. 3. Named the red planet
  4. 6. Bright lights in the sky from particles burning up (shooting stars)
  5. 7. The force that keeps a planet moving and not falling
  6. 8. An event where two bodies exert forces in a short time (like an impact)
  7. 9. Rocky space objects between the orbits of Jupiter and Mars
  8. 10. The largest planet in our solar system