Across
- 4. Galaxy with no defined shape.
- 7. "Arms" coming out from the center of this galaxy.
- 8. Has one star, eight planets, five dwarf planets, at least 290 moons, more than 1.3 million asteroids, and about 3900 comets.
- 9. A type of galaxy with a ring-like appearance.
Down
- 1. Giant balls of hot gas – mostly hydrogen, with some helium and small amounts of other elements.
- 2. Oval-like galaxy.
- 3. These are pinwheels within the galaxy that are made up of stars, planets, asteroids, and hydrogen clouds that reach out from the center of the galaxy to its edges.
- 5. Huge collection of gas, dust, and billions of stars and their solar systems, all held together by gravity.
- 6. Our galaxy
- 8. The star at the heart of our solar system