These are images of galaxies outside the Milky Way. Galaxies are essentially huge clusters of stars that usually rotate around a black hole. You can think of galaxies as giant star cities scattered throughout the universe. The galaxies shown here are generally the ones brightest and closest to us.

To zoom in and around the images, go to the detail page by selecting the image or by tapping the detail page button in each image panel.

If you zoom in and look carefully at the images here and elsewhere on this site you can often spot some of the smaller and fainter galaxies picked up by the camera. Usually they are just a faint smudge of light that does not look quite like the stars next to it. I have looked up some of these and found that a galaxy as faint as 15th magnitude can sometimes light up a few pixels even with a small scope.