Crossing Space

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Across
  1. 3. People used to believe that the earth was in the centre of the Universe and that the universe was this.
  2. 5. A change in speed or velocity
  3. 6. Uranus and Saturn have a complete one. What's it called when it is forming?
  4. 8. The outer part of Earth's atmosphere is called what?
  5. 11. When the day and night are the same amount of time around the world.
  6. 12. when the position of the Moon in its orbit when at new or full phrase.
Down
  1. 1. A small space rock, so small that when it hits the Earth's atmosphere it doesn't create the shooting star effect.
  2. 2. What is the substance that can't be broken down any more. There are 92 of them.
  3. 4. A stony meteorite
  4. 7. What is it called when an object in space is orbiting and it is the furthest away from the sun than it can.
  5. 9. The point directly above your head is called what?
  6. 10. When the moon is more than half full, but less than full. This is called _______.