Vocabulary revision - Planetarium and UFO Day

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Across
  1. 2. in detal; with much infromation as possible
  2. 4. the forming of a theory without firm evidence
  3. 5. the remains of something that has been destroyed
  4. 9. fictional beings from outer space; aliens
  5. 10. able to read and write
Down
  1. 1. a brief and unexpected meeting with someone or something
  2. 3. in the process of experimanting; not yet finalized
  3. 5. an area, often covered with sand or rocks, where there is very little rain and only a few plants
  4. 6. fly or rise high in the air
  5. 7. happening at the same time; together
  6. 8. a rounded roof on a building