Sky merger

Credit: NASA, ESA, and Hubble SM4 ERO Team What is happening in this image? Tadpoles swimming in deep space? Starry fish rubbing against each other? A high-speed galactic collision? Distances between galaxies are generally very great. But gravity, the force that holds...

Owl Eyes

Credit: NASA, ESA, and the Hubble Heritage (STScI/AURA) A pair of owl eyes stare out of this image from NASA’s Hubble Space Telescope of the galactic group called Arp 194. Nearly everywhere we look in the universe we see galaxies. And even though galaxies are...