Across
- 1. A very luminous and distant active galactic nucleus
- 3. A cloud of gas and dust in space
- 4. The path of a celestial body around a star
- 6. A system of millions or billions of stars
- 8. A small rocky body orbiting the sun
- 9. A celestial body moving in an elliptical orbit
- 10. An icy body that releases gas and dust
Down
- 2. A stellar explosion that briefly outshines an entire galaxy
- 5. An instrument for observing distant objects
- 7. An artificial body placed in orbit around the earth