Astronomy

5. The fuzzy cloud surrounding the nucleus of a comet.
12. Any object in the Solar System beyond Neptune.
13. A type of meteorite composed mostly of silicate minerals.
14. A small rocky or metallic body in outer space before it enters Earth's atmosphere.
15. A streak of light, produced when a space rock burns up in Earth's atmosphere.

1. A well-known comet that orbits the Sun every 76 years.
2. The tail of a comet made of small particles.
3. The solid core of a comet made of ice and rock.
4. A distant spherical shell of icy bodies surrounding the Solar System.
6. A type of meteorite that is primarily composed of iron and nickel.
7. A small rocky body orbiting the Sun, mostly found in the asteroid belt.
8. A space rock that survives its passage through the atmosphere and lands on Earth.
9. The largest asteroid in the asteroid belt and also classified as a dwarf planet.
10. The tail of a comet made of ionized gases.
11. A region of the Solar System beyond Neptune's orbit containing many small icy bodies.