NASA Exploration

4. This is the most dense of the outer giant planets, and the coldest
8. The ___ Space Telescope orbits the Earth
9. This is an area of rocky chunks between Mars and Jupiter
10. More than two-thirds of this planet is covered in water
11. The planet with the largest ring system and most moons
15. Two missions that visited Jupiter & Saturn
18. The ___ Space Station orbits the Earth; launched in 1998 and continually occupied since 2000
19. This is an area of rocky and icy debris outside Neptune's orbit
21. The spherical "shell" of comets, ice, and rocks at the very outer edge of the Solar System

1. A deep space telescope launched in 2021 that orbits the Sun
2. The most massive planet, which has a red storm three times wider than Earth
3. This mission took the clearest ever photographs of Pluto, and is now traveling through the Kuiper Belt
5. This dwarf planet is located in the Asteroid Belt
6. The planet with the largest volcano in the Solar System
7. Other than Earth, this is the only other natural object in the Solar System humans have walked on
12. A series of missions that landed on the moon
13. This planet has the most extreme seasons because its axis is tilted on its side
14. The planet with the highest average temperature due to its thick atmosphere and proximity to the Sun
16. This is the first dwarf planet outside of Neptune's orbit
17. The closest planet to the Sun; covered in craters like our Moon
20. Two ___ landed on Mars, named Spirit and Opportunity in 2004