Galactic Challenge

2. - A vast system of stars, gas, and dust bound together by gravity.
3. - A large celestial body that orbits a star and does not produce its own light.
8. - Referring to the Sun, or anything powered by the Sun's energy.
9. - The universe seen as a well-ordered whole.
12. - A planet that orbits a star outside our solar system.
14. - A small rock or particle from space that burns up when entering Earth's atmosphere.
15. - A small icy body that orbits the Sun and has a visible tail.
16. - A cloud of gas and dust in space, often a nursery for stars.
18. - A person trained for space travel and exploration.

1. - A unit of distance that represents how far light travels in one year.
4. - A large galaxy closest to our Milky Way.
5. - A piece of a meteor that survives its journey through the atmosphere and lands on Earth.
6. - Name of the space telescope that provided deep images of the universe.
7. - A small rocky object that orbits the Sun, mostly found in the asteroid belt.
8. - The explosion of a star, leading to a burst of light and energy.
10. - A small object that orbits a larger celestial body.
11. - A very energetic and distant active galactic nucleus.
13. - A tool used by astronomers to observe distant objects in space.
17. Hole - A region in space where gravity is so strong that not even light can escape.
19. - The curved path of a celestial object around a star, planet, or moon.