To the world from India :Group 1 Pg:1 and 3

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Across
  1. 2. unit of distance equal to 7.2 km
  2. 4. estimated circumference of the earth
  3. 6. aryabhat's text of discoveries
  4. 9. alternate name of algebra
  5. 10. famous astronomical observatory in nalanda university
Down
  1. 1. concept of zero originated here
  2. 3. India's first satellite launched in 1975 nalanda university housed 9 million books
  3. 5. first reference to astronomy
  4. 7. referred to as zero by arabs
  5. 8. elementary particle of matter