Solar system

4. Earth's only natural satellite
8. a streak of light in the sky caused by a meteoroid crashing through Earth's atmosphere.
11. a vehicle or machine designed to fly in outer space.
12. the fifth planet from the Sun and the largest in the Solar System.
13. a 4.5 billion-year-old star – a hot glowing ball of hydrogen and helium at the center of our solar system.
14. was discovered in 1781 by astronomer William Herschel

1. a dwarf planet that lies in the Kuiper Belt.
2. the fourth planet from the Sun – a dusty, cold, desert world with a very thin atmosphere.
3. an icy, small Solar System body that, when passing close to the Sun, warms and begins to release gases, a process that is called outgassing.
5. a person trained, equipped, and deployed by a human spaceflight program to serve as a commander or crew member aboard a spacecraft.
6. Earth's closest planetary neighbor and the hottest planet in our solar system.
7. the eighth and farthest-known Solar planet from the Sun.
9. the only place in the known universe confirmed to host life.
10. the smallest planet in the Solar System.
13. the farthest planet from Earth that's visible to the naked human eye, but the planet's most outstanding features — its rings — are better viewed through a telescope.