Across
- 1. A young star in its early stage of life
- 3. The unit used to measure temperature
- 4. A cloud of dust and gas
- 7. A type of galaxy that is shaped like an oval, and contains many old stars
- 8. Brightness of a celestial object
Down
- 2. A type of galaxy that has arms that curve out from a central bulge
- 5. The theory that the universe all started from a single point, exploded, and is constantly expanding outwards
- 6. A type of galaxy that does not have a distinct shape, and contains a lot of gas and dust