Across
- 2. A special instrument to study heavenly bodies
- 4. Indian name of Planet Mercury
- 5. Innermost layer of the earth
- 6. The movement of the earth around the Sun
- 7. The fixed path on which Planets move
- 9. A Planet with rings
Down
- 1. India's first artificial satellite
- 3. A dwarf Planet
- 5. The layer of Earth we live on
- 8. This causes day and night