Across
- 4. Sunlight is a mixture of visible light and this type of radiation.
- 5. Our planet travels around the Sun in this type of orbit
- 6. This happens when a massive star uses up the nuclear fuel in its core
- 9. A sphere of trillions of planetesimals (small rocky or icy bodies) that surround the solar system
- 10. He first stated that Earth was round and not flat
Down
- 1. The hottest plant in the solar system
- 2. The brightest star in the sky, visible from both hemispheres.
- 3. The point of no return around a black hole
- 7. It is the coldest temperature possible
- 8. The largest constellation