ALT Four distinct composite images presented in a two-by-two grid. Upper left, an image of five galaxies known as Stephan's Quintet. Upper right, is an image of the Cartwheel galaxy, a neon pink disk with an outer ring, and a solid, slightly off-center spiraling core. Lower left, an image of the galaxy cluster SMACS 0723 which contains hundreds of individual galaxies in a sea of black space. Lower right, an image of the Carina Nebula, which resembles a rust brown mountain range backed by a hazy blue night sky. Full visual descriptions of these images are available at the link in the post and as alternative text for the individual images below.