The Solar System

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Across
  1. 2. Third closest planet to the Sun; the only planet in the Solar System known to harbor life.
  2. 4. A moon of Pluto that was discovered in 2005
  3. 6. Sixth planet from the Sun; known for its magnificent system of rings.
  4. 9. Farthest planet in the Solar System and is also blue. It's the coldest planet due to its significant distance from the Sun. Its atmosphere is composed of hydrogen, helium, and methane which gives it its blue color.
  5. 11. A celestial body that lies mostly in the asteroid belt between Mars and Jupiter.
  6. 14. Is one of Jupiter's moons and is the most geologically active body in the Solar System. Its volcanic eruptions can reach great heights, and it has mountains higher than Mount Everest.
  7. 15. Second closest planet to the Sun, has an atmosphere made mostly of carbon dioxide with a small portion of nitrogen and other trace elements.
  8. 17. Was discovered in the Kuiper belt on the outer regions of the Solar System past the orbit of Neptune; it has two orbiting moons.
  9. 18. Seventh planet from the Sun; it's very blue and has a unique rotation style by rotating on its side.
  10. 19. Is one of Jupiter's moons and is the third largest moon in the Solar System. It has a heavily-cratered surface with a thin atmosphere of carbon dioxide and oxygen.
  11. 20. Is one of Jupiter's moons and is the largest moon in the Solar System. It is larger than the planet Mercury. There is still evidence of geologic activity on Ganymede.
  12. 22. Closest planet to the Sun; lacks an atmosphere completely.
  13. 23. This farthest reaching celestial object was thought to have been the tenth planet in the Solar System. Has a moon
  14. 24. Commonly referred to as "dirty snowballs" because they are composed of ice and rock
Down
  1. 1. Dwarf planet located in the asteroid belt; was once classified as a comet, then as an asteroid
  2. 3. A moon of Pluto and is half the size of it.
  3. 5. Objects that orbit the Sun at a farther distance than Neptune. These objects are located in the Scattered Disk
  4. 7. The moon of Eris
  5. 8. A moon of Pluto that was discovered in 2005
  6. 10. The third largest dwarf planet behind Pluto and Eris; takes 310 years to make one complete revolution around the Sun.
  7. 12. Is one of Jupiter's moons and is composed of ice and water; slightly smaller than Earth's Moon. The surface of Europa is covered with streaks and cracks.
  8. 13. Most famous dwarf planet; was once considered to be a planet
  9. 16. Fifth planet from the Sun, has the most moons of any planet in our Solar System and is the largest planet.
  10. 21. a small, rocky object from space that is heated up as it enters the Earth’s atmosphere.
  11. 25. Known as the "red planet" for its iron-rich soil; takes 687 Earth days to orbit the Sun.