Across
- 2. the theory of the universes beginning
- 4. a point of no return
- 5. a cloud of gas and dust in outer space
- 6. the creation of new atomic nuclei
- 10. a young star still gathering mass
- 11. a system of stars
- 13. earths only natural satellite
- 14. relating to stars
- 15. consists of positive and neutral neutrons
- 16. protons and neutrons
Down
- 1. all of space and time and their contents
- 3. a large astronomical body that is neither a star nor a stellar remnant
- 4. an essential or characteristic part of something abstract
- 7. a fixed luminous point in the night sky which is a large
- 8. the curved path of a celestial object
- 9. relating to the universe or cosmos
- 12. a type of energy that is all around us and takes many forms