physics 10

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Across
  1. 2. system what system contains a sun and planets
  2. 3. BELT Between Mars and Jupiter
  3. 5. My teacher calls himself
  4. 7. invented by Dirac
  5. 9. the program of human traveled on the moon
  6. 11. how many humans walked on the moon
  7. 13. combination of atoms
  8. 15. Milky Way the white band in the sky is made of stars
  9. 16. closet planet to the sun
  10. 18. they have a very regular organized structure
Down
  1. 1. found in the nucleus of an atom
  2. 3. the topic about planets, black holes, galaxies, big bang, and quasars
  3. 4. big and light, negative charge
  4. 6. a position was the first example of it
  5. 8. the planet which we are living
  6. 10. hundreds of billions of it and lots are spiral
  7. 12. the measure of distance between planets
  8. 14. by volume it is mostly empty
  9. 17. Dwarf what will our sun eventually become
  10. 19. the earth gets most energy from it