Universe

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Across
  1. 2. The first artificial satellite launched into orbit
  2. 6. partial eclipse
  3. 7. the 90% of ozone layer is in _______
  4. 8. study of the relationship between living things and environment
Down
  1. 1. coldest part of the atmosphere
  2. 3. underwater volcanic eruption
  3. 4. zone of life
  4. 5. latest satellite launched by ISRO