From East Tennessee State University:
A pair of interacting galaxies might be experiencing the galactic equivalent of a mid-life crisis. For some reason, the pair, called Arp 82, didn't make their stars early on as is typical of most galaxies. Instead, they got a second wind later in life – about 2 billion years ago – and started pumping out waves of new stars as if they were young again.
The new observations are from NASA's Galaxy Evolution Explorer, NASA's Spitzer Space Telescope and the Southeastern Association for Research in Astronomy Observatory at Kitt Peak, Ariz.
Read more here: