Across
- 3. is the most massive and second-largest known dwarf planet in the Solar System.
- 5. Is an ice giant with a unique feature – it rotates on its side, giving it a distinctive appearance.
- 7. Is a dwarf planet in the Kuiper belt, a ring of bodies beyond the orbit of Neptune.
- 8. The only planet known to support life.
- 12. It has a diameter approximately that of Saturn's moon Iapetus, or 60% that of Pluto.
- 13. The largest planet in the solar system.
- 14. Often called Earth's "sister planet" due to its similar size and composition.
Down
- 1. A non-resonant object, it measures approximately 1,086 km in diameter.
- 2. Is a small, rocky world with a thin atmosphere.
- 4. The farthest known planet from the Sun.
- 6. Is a dwarf planet in the outermost reaches of the Solar System discovered in 2003.
- 9. It was the first asteroid discovered, on 1 January 1801, by Giuseppe Piazzi at Palermo Astronomical Observatory in Sicily and announced as a new planet.
- 10. Is another gas giant with a wide array of moons, including Titan, which has a thick atmosphere and lakes of liquid methane.
- 11. It was discovered in 2004 by a team headed by Mike Brown of Caltech at the Palomar Observatory in the United States and disputably also in 2005 by a team headed by José Luis Ortiz Moreno at the Sierra Nevada Observatory in Spain.
- 12. Often referred to as the "Red Planet" because of its reddish appearance.