Earth's Place in the Universe

1234567
Across
  1. 1. Large cluster of star, dust, gas and matter
  2. 3. Small, icy body with elongated orbit around the sun
  3. 7. Planets made of rocky material
Down
  1. 1. Planets made from gaseous elements
  2. 2. Includes all matter and space that exists
  3. 4. Rocky material passing through Earth's atmosphere
  4. 5. Rocky bodies often found in a belt
  5. 6. Formed about 5 billion years ago from rotating disk of dust