Universe

1234567
Across
  1. 2. Also known as the Red Planet, this is the 4th planet from the Sun
  2. 6. It is the near-vacuum between celestial bodies (planets)
  3. 7. Someone who is specially trained to travel into outer space
Down
  1. 1. A group of visible stars that form a pattern when viewed from Earth
  2. 3. A chunk of rock and metal in outer space that is in orbit around the Sun
  3. 4. An invisible force that pulls objects toward each other (e.g us and the ground)
  4. 5. The planet we live on
  5. 6. A big ball of glowing matter that lights up the night's sky