galaxies

there are billions of galaxies in the universe.

scientists study the formation of galaxies.

galaxies can collide and merge over time.

some galaxies are spiral in shape.

galaxies are made up of stars, gas, and dust.

we can observe distant galaxies with powerful telescopes.

galaxies are often classified by their shapes.

some galaxies are home to supermassive black holes.

galaxies can be found in groups or clusters.

the study of galaxies helps us understand the universe.