Across
- 2. Structures comprising tens to thousands of galaxies held together by gravity.
- 3. circle/oval shaped galaxy
- 5. Invisible substance that makes up most of the universes matter
- 6. galaxies are moving away from us at speeds proportional to their distance, representing the expansion of the universe.
- 9. large galaxy consumes a smaller one,
- 12. dense clusters containing over a thousand galaxies
- 15. A spiral Galaxy with a central bright bar shaped structure
- 16. Massive system of stars, gas, dust and dark matter
- 17. elliptical galaxies emitting immense radio energy.
Down
- 1. spirals with bright nuclei
- 4. Galaxies with no defined shape
- 7. cluster containing over 50 galaxies, including the Milky Way and Andromeda.
- 8. Galaxies with highly luminous centers, powered by black holes
- 10. Galaxy with arms containing stars, gas and dust
- 11. A small cluster with fewer than a thousand galaxies.
- 13. A hybrid type intermediate between elliptical and spiral
- 14. structure consisting of numerous galaxy clusters and smaller groups.