Across
2. An object that orbits a planet.
3. Motion that is backward compared to the norm.
5. We live in a __________ solar system, with the Sun at the center.
6. This dwarf planet is named after one of the gods of ancient Easter Island.
8. The point at which an object orbiting the Sun is farthest from the Sun.
9. A fairly large object that orbits a star.
13. This is a dwarf planet that used to be known as the ninth planet.
14. This dwarf planet is named after a Hawaiian godess.
16. A ball of ice and dust that is sometimes orbits the Sun.
22. Planet with a set of dark rings that are extremely difficult to photograph.
23. The point at which an object orbiting the Sun is closest to the Sun.
24. The most massive dwarf planet currently known in the solar system.
25. This huge gas giant planet is more massive than all of the other planets combined.
26. Closest planet to the Sun; a desolate, cratered, airless world.
27. The point at which an object orbiting the Earth is farthest from the Earth.
28. This planet has about half of Earth's diameter and 2 small moons.
Down
1. The spinning of an object around its axis.
4. The only dwarf planet in the asteroid belt.
7. The orbital motion of one object around another.
10. An ____________ unit is the average distance of the Earth from the Sun.
11. The point at which an object orbiting the Earth is closest to the Earth.
12. This planet's pale blue-green color is due to the methane in its atmosphere.
15. A relatively small and rocky object that orbits a star.
17. ________ conjunction is an alignment of an inner planet, the Sun, and the Earth in that order.
18. Blue oceans cover about 75% of its surface.
19. This planet has a beautiful ring system and more than 20 moons.
20. _____ conjunction is an alignment of the Sun, an inner planet, and the Earth in that order.
21. This planet is sometimes called our "sister planet" and it is enshrouded in clouds.
Solar System list
aphelion
apogee
asteroid
astronomical
Ceres
comet
Earth
Eris
heliocentric
Haumea
inferior
Jupiter
Makemake
Mars
Mercury
moon
Neptune
perigee
perihelion
planet
Pluto
retrograde
revolution
rotation
Saturn
superior
Uranus
Venus
