Space Links

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Across
  1. 2. a self-propelled object that carries its own fuel
  2. 4. a group of stars, gas and dust held together by gravity
  3. 5. all things that take up space have this
  4. 6. anything which occupies space and possesses rest mass, especially as distinct from energy
  5. 7. where our Solar System or main sequence system is found
  6. 9. an object moving around a star
  7. 10. a self-luminous object that shines through the release of energy produced by nuclear reactions at its core
  8. 12. occurs when the force of thrust is greater than the weight of the rocket
  9. 14. the path one object takes around another
Down
  1. 1. a cloud of gas and dust
  2. 3. a grouping of stars which have been given names by ancient astronomers because of the way they look
  3. 4. the force that attracts a body towards the centre of the earth, or towards any other physical body having mass
  4. 8. a rock or minor planet orbiting the sun
  5. 11. an imaginary straight line on which an object rotates
  6. 13. the substance used to power the object