Solar System Unit Crossword Puzzle

4. The sun, moon, Earth, other planets, meteors, asteroids, and comets make up our ___ ___.
8. This is the largest planet in our solar system.
9. This is the 7th planet from the Sun. It has the largest tilt of any planet and spins on its side!
10. If the ___ of an object increases, the force of gravity increases.
12. Pluto is a ___ planet because it revolves around the sun, and can maintain a nearly round shape as planets do, but it cannot move other objects away from its orbital neighborhood.
16. Aristotle and Ptolemy believed that the ___ was at the center of the universe.
17. The ___ ___ orbits around the sun between Mars and Jupiter and separates the inner planets from the outer planets.
18. *The only place in our solar system that has been visited by manned exploration outside Earth is the ___.
19. This planet has no atmosphere and takes the shortest amount of time to revolve around the sun because it is closest to the sun.
20. This planet is the furthest out in our solar system.

1. The inner planets are called "terrestrial planets" because they are small and ___.
2. This is the hottest planet because a blanket of clouds trap heat in its atmosphere.
3. A(n)___ is a rocky body, smaller than a planet, that orbits the Sun.
5. Atmosphere, ___ ___, and distance from the sun make Earth a haven for life.
6. Now we know that all four gas giants have ___, not just Saturn.
7. Your ___ changes on different planets, but your mass stays the same.
10. A(n) ___ is also called a "shooting star" because it burns up in our atmosphere.
11. The outer planets are called "___ ___" because of their size and composition.
13. ___ is the force that keeps planets in motion around the sun.
14. A(n) ___ is an icy body that releases gases as it orbits the Sun.
15. With his invention of the ___, Galileo found more proof that the sun was the center of the solar system.
18. This planet is known as the "red planet" because the soil looks like rusty iron.