Week 2 Vocabulary

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Across
  1. 4. rocky leftovers from formation of solar system
  2. 6. planet farthest from sun
  3. 7. gas and ice giant planets
  4. 9. cloud of gas and dust that was the start of the solar system
  5. 10. these are moving away from us at increasing speed, according to Hubble
Down
  1. 1. nuclear ___________ describes combining two Hydrogen atoms creating light and heat energy
  2. 2. planet closest to sun
  3. 3. natural satellite that orbits a planet
  4. 5. terrestrial, or earthlike planets
  5. 8. one theory of its creation is the Big Bang