Planets

1. the distance light travels in one year
3. invisible matter that makes up most of the universe
12. a small rocky object that orbits the sun
15. the point around a black hole where nothing can escape
17. a large, aging star that has expanded
18. everything that exists including all space, time, matter, and energy
20. a planet outside our solar system
22. a massive system of stars, gas, dust, and dark matter held together by gravity
23. a distant cloud of icy bodies surrounding the solar system
25. a space rock that burns in Earth’s atmosphere

2. the force that pulls objects toward each other
4. a spinning disk of gas around a black hole or star
5. a star and all the objects that orbit it
6. BlackHole a region in space with gravity so strong that nothing can escape it
7. a small, dim star
8. a region beyond Neptune filled with icy objects
9. a meteor that reaches Earth’s surface
10. an icy object that forms a glowing tail near the sun
11. a large object that orbits a star and does not make its own light
13. a powerful explosion of a dying star
14. a small, dense remnant of a star
16. A cloud of dust and debris
19. an extremely dense star made mostly of neutrons after a supernova explosion
21. the path an object takes around another object
24. a group of stars forming a pattern