Solar System Vocabulary

2. Dark, flat areas on the moon, formed from lava flows that occurred billions of years ago.
4. The largest planet in our solar system.
6. An object with gravity so strong that nothing, not even light, can escape it.
8. An object that orbits the sun and has enough gravity to be spherical, but has not cleared the area of its orbit.
9. The correct model of the solar system.
12. Loose collections of ice, dust, and small rocks that orbit the sun.
14. A region of the solar system between Mars and Jupiter made up of small objects in space.
15. Consists of the sun, the planets, their moons, and a variety of smaller objects.
18. Characteristics used to classify stars include color, temperature, size, composition, and what?
20. The planet tilted on its axis, likely due to an ancient collision.
21. The force that attracts all objects toward each other.
23. Areas of gas on the sun's surface that are cooler than the gases around them.
25. Earth's "twin".

1. Called the "red planet".
2. Closest planet to the Sun.
3. When a supergiant star runs out of fuel, it can explode and form a what?
5. A dry and airless rock that orbits the Earth and reflects light from the sun.
7. Another name for the inner planets that have rocky surfaces.
10. Large round pits on the moon.
11. Farthest planet from the sun and known for its bright blue color.
13. Beyond Neptune's orbit and composed of thousands of rock particles, ice, dust, and dwarf planets.
15. Gas eruptions into space from the surface of the Sun.
16. Chunks of rock or dust from space that collide with the moon.
17. The nickname given to the outer planets that do not have a solid surface.
19. The star located at the center of our solar system.
22. The only planet in our solar system to have life.
24. Has at least 62 moons, icy rocks, and dust that make up a large ring that circles the planet.