Across
- 2. A unit of measure approximately 6 trillion miles, measured using photons and time.
- 4. A “dirty snowball” of ice and rocky debristhat orbits the Sun in a long ellipse.
- 5. Very large and containing billions of stars.
- 7. A distinctive pattern of stars.
- 8. Great clouds of glowing gas lit up by stars.
- 9. A concentration of mass so dense that nothing can escape its gravitational pull.
- 10. A brief streak of light caused by a small piece of solid matter entering Earth’s atmosphere.
Down
- 1. An event that occurs when the shadow of a planet or moon falls upon a second body.
- 3. When an object moves in the reverse sense of “normal” motion.
- 6. A solid body orbiting the Sun that consists of metal and rock.