Unit 1- The formation of the solar system

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Across
  1. 2. The star at the center of out solar system
  2. 4. A developing planet formed from collision of planetesmals
  3. 7. icy bodies that from form tails when they get close to the sun
  4. 8. That flat,spinning shape of material surrounding a young star
  5. 9. the force that pulls matter together to start the formation of the solar system
Down
  1. 1. Leftover rocky objects mostly found between mars and jupiter
  2. 3. The process where particles stick together to form larger bodies
  3. 5. a large cloud of gas and dust where stars and planets began to form
  4. 6. the path a planet follows around the sun