How far from the sun do you have to be to die?

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Across
  1. 2. a lamp gives _
  2. 4. the biggest star in the solar system
  3. 5. a way to debate if its hot or cold
  4. 7. where living things live
  5. 8. the gravitational bound system of the Sun and the objects that orbit it.
Down
  1. 1. a round object in space
  2. 3. in the summer it is usually _
  3. 6. an answer that is around the real answer