Across
- 4. Contains no protons, neutrons and electrons; makes up most of the mass of galaxies and galaxy clusters (2 words).
- 6. Particles acquire mass as they travel through this field Down
- 7. A star whose apparent brightness changes predictably with time.
- 8. Distortion of light from a far galaxy by a massive object closer to us (2 words)
- 9. The study of the universe.
Down
- 1. Describes the evolution of the universe from a singularity (3 words).
- 2. Force responsible for universal expansion (2 words)
- 3. The largest, most massive, structures in the universe (2 words)
- 5. Hypothetical shortcut through spacetime.
- 10. A collection of stars held by mutual gravity.