Across
- 4. an instrument used for measuring very small quantities of heat
- 6. the position of the moon in its orbit when at new or full phase
- 7. shaped like or forming a ring
- 10. a brilliant meteor which may explode during its descent through the earth's atmosphere
Down
- 1. the path the sun, moon and planets all follow in the sky
- 2. the center of gravity of the earth and moon
- 3. a group of atoms linked together
- 5. the bright surface of the sun
- 8. the dark inner part of a sunspot or shadow
- 9. the hazy looking patch surrounding the nucleus of a comet