Zoom in from the Hubble Space Telescope through the constellation Lynx marked with white lines to the Lynx Arc red. The Lynx Arc appears as the red smear above and right of centre in the final view. It is only visible thanks to the lensing effect. It is the largest, brightest and hottest starbirth region ever found, containing a million hot blue stars. The cluster existed when the universe was only two billion years old.