After an electrical malfunction caused it to go dormant a month ago, the Hubble Space Telescope is back in business. But the space shuttle mission to repair and upgrade the Hubble has been pushed back again, NASA officials said Thursday.

To show this week that the orbiting eye still has the same chops as ever, astronomers from the Space Telescope Science Institute in Baltimore used Hubble's wide-field planetary camera 2 to record this image of a pair of smoke-rings galaxies known as Arp 147.

The galaxies, about 450 million light-years away in the constellation Cetus, apparently collided in the recent cosmic past. According to Mario Livio, of the space telescope institute, one of the galaxies passed through the other, causing a circular wave, like a pebble tossed into a pond, that has now coalesced into a ring of new blue stars. The center of the impacted galaxy can be seen as a reddish blur along the bottom of a blue ring.

(Picture here).