The Hubble Space Telescope is keeping watch over many, many galaxies using the combined superpowers of its incredible optics and a quirk of nature called gravitational lensing – http://bit.ly/2qaWCVD | Cosmos - the Science of Everything

Galaxies are concentrations of stars, gas, dust, and dark matter. They come in a variety of shapes and sizes. Some are fated to collide, like the Milky Way and Andromeda. Credit: NASA and J. Olmsted (STScI) | NASA's James Webb Space Telescope