Across
- 1. A distant, extremely bright object powered by a supermassive black hole at the center of a young galaxy.
- 3. A system where two stars orbit around a common center of mass.
- 4. An object that orbits a star, is massive enough to be shaped into a sphere by gravity and has cleared its orbit of other debris.
- 8. A galaxy shaped like a round or oval ball, with very little gas or dust. These galaxies mostly contain older stars and have less star formation.
- 9. A glowing shell of gas ejected from a dying medium-sized star. Despite the name, it is too small to form new stars or planets
- 13. A large cloud of gas and dust in space.
- 14. A ball of hot gases that produces light and heat.
Down
- 2. A galaxy with a flat, rotating disk containing stars, gas, and dust, with spiral arms winding outward from the center.
- 5. A small cluster of galaxies that are gravitationally bound together.
- 6. A collection of objects bound by gravity to a star, including planets, moons, asteroids, comets, and dust.
- 7. A rapidly spinning neutron star that emits beams of radiation
- 10. The collapsed core of a massive star after a supernova. If it were a little bigger it would collapse into a black hole
- 11. An extremely dense region in space where gravity is so strong that not even light can escape.
- 12. A gigantic group of galaxy clusters bound loosely together by gravity.