Across
- 3. The curved tail of a comet that is forced away by solar radiation pressure.
- 4. The straight tail made of sublimated gases forced away by solar winds.
- 6. The width of an ellipse.
- 7. A comet that passes extremely close to the Sun at perihelion.
- 8. A circumstellar disc in the outer Solar System
Down
- 1. The distance between the Earth and the Sun.
- 2. Cosmic debris entering Earth's atmosphere at extremely high speed.
- 5. A predicted collection of icy objects farthest away from everything in the Solar System.