Across
- 4. term describing a model of the universe in which Earth is at the center of the revolving planets and stars
- 5. an oval shape which may be elongated or nearly circular; the shape of the planets' orbits
- 7. a ball of hot gas, primarily hydrogen and helium, that undergoes nuclear fusion
- 9. an object that orbits a star, is large enough to have become rounded by its own gravity, and has cleared the area of its orbit
Down
- 1. a pattern or grouping of stars that people imagine to represent a figure or object
- 2. term describing a model of the solar system in which Earth and the other planets revolve around the sun
- 3. a loose collection of ice and dust that orbits the sun, typically in a long, narrow orbit
- 6. an object that orbits a planet
- 8. a streak of light in the sky produced by the burning of a meteoroid in Earth's atmosphere