Across
- 5. A terrestrial planet within the Solar system with an atmosphere that is capable of having water in three forms; which is essential for life.
- 7. A G2 sequence star that has a planetary system of eight planets, and an innumerable amount of other celestial objects; i.e. moons, dwarf planets, asteroids.
- 10. A planet that does not meet the three requirements to become a planet
- 11. A meteoroid that impacts or reaches the Earth's surface without burning up completely
- 12. A naturally occurring physical entity, association, or structure that exists outside of Earth's atmosphere that can be found in the observable universe.
Down
- 1. Planets composed made mostly of rocks and metals, have solid surfaces with atmospheres.
- 2. A large planet that consists of mostly gas hydrogen and helium in a dense form.
- 3. The remnants of a comet, asteroid, or planet that has broken free and is floating around at extremely high speeds in space.
- 4. Any of numerous small solid celestial bodies composed of rock and metal that move around the Sun.
- 6. An object that orbits a star, is large enough to have become rounded by its own gravity, and is large enough to dominate or impact those within its orbit.
- 8. A meteoroid that has entered Earth's atmosphere and produces a streak of light in the sky as it burns.
- 9. A celestial object consisting of a nucleus of ice, rock, and dust; when near the sun, a "tail" of gas and dust particles form pointing away from the sun.