Universe

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Across
  1. 4. baby planets
  2. 6. extraterrestrial dust or space dust
  3. 8. Creation of universe
  4. 9. First element on the periodic table
  5. 10. if the nebula clouds get too big, gravity wins and they can start to _______
  6. 12. The exact opposite of matter annihilate each other when they come in contact
  7. 13. Mysterious force that's causing the rate of expansion of our universe to accelerate over time, rather than to slow down
Down
  1. 1. Curved path of a celestial object around a star, planet, or moon
  2. 2. A rotating, flattened disk of gas and dust
  3. 3. The "Gas giant"
  4. 4. Celestial body moving around a star
  5. 5. The solar system's star
  6. 7. Hypothetical form of matter that forms 85% of our universe that causes dark energy
  7. 11. Massive self-luminous celestial body of gas that shines by radiation