1. upagrah   satellite   gravity   astronaut   astronomer   Hint Half-n-half Clue   2. grahikaa, kshudragrah   asteroid   telescope   comet   meteorite   Half-n-half Clue   3. antariksh yaatree   telescope   astronaut   meteorite   Earth   Half-n-half Clue   4. khagolgya   orbit   Earth   moon   astronomer   Half-n-half Clue   5. aakaashagangaa   galaxy   light years   Sun   universe   Half-n-half Clue   6. gurutvaakarshan   solar system   galaxy   light years   gravity   Half-n-half Clue   7. vaayumandal   gravity   comet   orbit   atmosphere   Half-n-half Clue