Communicate

123456789
Across
  1. 3. to join together
  2. 4. study of the origin and future life of the universe
  3. 6. the study of stars, planets, and the universe
  4. 8. not sure
  5. 9. to finish or finalize
Down
  1. 1. science of the stars
  2. 2. study of physics and chemistry of stars and planets
  3. 5. to agree
  4. 6. a symbol that looks like a star
  5. 7. another word for an idea