Galaxies pl. : of Galaxy

Example:
What evidence suggests that small Galaxies in our Local Group have undergone two or more starbursts in the pas?

Taxonomy
galaxies, the Milky Way, gas, universe, spiral galaxies, spiral arms, elliptical, NASA, Astrophysical Journal, harvard, star formation, mass, theories, Milky Way galaxy, Hubble classification, appearance, merger, dwarf galaxies.

Defination from the web:
galaxies. ... A galaxy is a massive, gravitationally bound system that consists of stars and stellar ... Galaxies can also contain many multiple star systems, star clusters, and various interstellar clouds. ...