Across
- 2. – Interstellar cloud of gas and dust, birthplace of stars (6)
- 5. – Physical substance that has mass and occupies space (6)
- 6. – Relating to the universe as a whole (6)
- 8. – Vast system of stars bound by gravity (6)
- 9. – Force that pulls matter together and shapes galaxies (7)
- 12. – Energy that travels through space as waves or particles (9)
- 13. – Type of electromagnetic radiation left over from the early universe (9)
- 14. – Smallest possible unit of energy, central to modern physics (7)
Down
- 1. – What drives processes and change in the universe (6)
- 3. – All space, time, matter, and energy (8)
- 4. – Rapid expansion phase of the early universe (9)
- 7. – Word describing anything related to stars (7)
- 10. – Basic units of matter, made of protons, neutrons, and electrons (5)
- 11. – Event believed to mark the origin of space and time (7)