This image from the NASA/ESA Hubble Space Telescope features Arp 72, a very selective galaxy group that only includes two ...

In the vast expanse of the universe, galaxies collide, merge, and reshape themselves in a cosmic dance governed by gravity.

M82 is a nearby galaxy forming stars 10 times faster than the Milky Way due to gravitational interactions with its neighbour, M81. Arp 273, a pair of galaxies on a collision course, with the ...

A small blue dwarf galaxy passed through the massive Bullseye galaxy. This impact created nine rings of new stars.