Space

4. The study of space and things beyond Earth.
7. Everything that exists, including matter, energy, and space.
9. The four big planets farthest from the Sun: Jupiter, Saturn, Uranus, and Neptune.
13. Waves of energy that travel at the speed of light.
15. An object that travels around a planet or dwarf planet.

1. A huge ball of glowing gas that makes its own light.
2. A large object in space that orbits a star.
3. The four planets closest to the Sun: Mercury, Venus, Earth, and Mars.
5. The path a celestial object follows around another object.
6. Any object in space.
8. System The Sun and all the objects that move around it.
10. Energy that comes from a source, like the Sun, as waves.
11. Frozen dust and ice in space that makes a bright tail when near the Sun.
12. A small rock in space, mostly found between Mars and Jupiter.
14. A massive group of stars, gas, and dust held together by gravity.