Formation of the solar system - key words

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Across
  1. 3. A heavy element formed in the cores of stars and during supernovas.
  2. 4. A cloud of gas and dust in space, often where new stars are born.
  3. 6. A powerful explosion that occurs when a massive star dies.
  4. 7. A large object that orbits a star and does not produce its own light.
  5. 9. A massive system of stars, planets, gas, and dust held together by gravity.
  6. 10. A natural satellite that orbits a planet.
Down
  1. 1. The path one object takes around another in space due to gravity.
  2. 2. The force that attracts objects toward one another, especially towards the center of a planet or star.
  3. 5. A small rocky body orbiting the Sun, mostly found in the asteroid belt.
  4. 8. A small icy body that orbits the Sun and has a glowing tail when near it.