1. Spherical cloud of dust and gas that surrounds the nucleus.
2. Coldest layer of the atmosphere.
3. Largest minor bodies in the solar system.
4. A small body made up of ice, rock and cosmic dust.
5. Comets that crash around the sun
6. Asteroids found beyond the asteroid belt
7. Comets that are found outside the solar system
8. Term used when meteoroid enters Earth.
9. Meteors that appear brighter than some meteors.
10. Comet that passes Earth every 76 years.
11. Phenomenon when many meteors appear from the same point.
12. Located between the orbits of Mars and Jupiter
13. A theoretical spherical cloud made up of predominantly icy planetesimals
14. Solid debris that can also originate from asteroids or comets.
15. Largest body in the asteroids belt ​