This new image of Stephen's Quintet, taken by the recently restored Hubble, shows a cluster of what appears to be five closely packed galaxies. But the quintet is an illusion: The bluish spiral galaxy in the upper left corner, called NGC 7319, is actually about seven times closer to Earth than the rest of the group.
Meanwhile, "the four yellowish galaxies you see are gravitationally interacting with each other," Hubble science chair Bob O'Connell said at a September 9, 2009, press briefing. "We expect that, over time, they will eventually merge into a single big galaxy."
Using its broad sensitivity to different kinds of light, Hubble's new camera spotted star clusters of different ages within the five galaxies--and star groups that can be seen only with infrared light.
Image courtesy NASA, ESA, and the Hubble SM4 ERO Team