Solar Systems

4. A type of planet composed mainly of "ices" such as water, ammonia, and methane, with a smaller proportion of hydrogen and helium.
5. A massive, luminous celestial body consisting of hot gases that generate energy through nuclear fusion in its core.
7. A large celestial body that orbits a star, is spherical in shape due to its own gravity, and has cleared its orbit of other debris.
8. A system comprising of a star and all of the celestial bodies that orbit around it, including planets, moons, asteroids, comets, and other objects.
10. A measure of how much an orbit deviates from a perfect circle.
12. Too small and surrounded by debris to be a considered a "planet." Pluto is one of these.
13. The spinning motion of a celestial object around its own axis.
15. A type of planet composed mostly of hydrogen, helium, and other gases, with relatively small solid cores.
16. Small rocky or metallic objects that orbit the Sun, vary in size from meters to hundreds of kilometers across. There's a belt of them between Mars and Jupiter.

1. The motion of a celestial object around another object in space.
2. An object that orbits around a larger celestial body, such as a planet or star.
3. Objects or phenomena in the sky or space.
6. Objects or phenomena related to Earth or other rocky planets.
9. Thin, flat bands of rocky or icy material that orbit around a planet's equator.
11. A geometric shape resembling a flattened circle, characterized by two focal points.
14. A natural satellite that orbits a planet.