Across
- 2. The star at the centre of our solar system.
- 5. A small rocky object that orbits the sun.
- 7. A planet outside our solar system that orbits a star
- 8. Sum total of everything that exists
- 9. A natural satellite
Down
- 1. A relatively large body rotating in an elliptical orbit around a sun
- 2. Has one or more suns surrounded by orbiting planets
- 3. A small object orbiting a star that has enough gravity to form an almost round shape.
- 4. A basic building block of the universe that includes stars, star clusters, clouds of gas, dust and interstellar molecules.
- 6. Principle component of galaxies