Across
- 2. The only natural satellite of our planet
- 3. The first animal to travel through space which died within hours of launch due to overheating
- 5. A boundless three-dimensional extent
- 6. A massive luminous sphere of plasma, held together by gravity
Down
- 1. The star at the centre of the Solar System
- 2. Famous Chocolate bar, and planet.
- 4. The Planet we live on