noun
- plural of galaxy; large collections of stars, gas, and dust held together by gravity
Examples
- Scientists estimate there are billions of galaxies in the observable universe.
- The Milky Way and Andromeda are neighboring galaxies.
- Distant galaxies appear as faint smudges through powerful telescopes.
- Spiral galaxies have distinctive curved arms of stars.
- Astronomers study how galaxies form and evolve over time.
- Some galaxies are colliding and merging with each other.
- The Hubble Space Telescope has captured images of countless galaxies.