* Astronomy

The galaxy Arp 192 shows a remarkable 'prominence' in an image taken on 19th February 1964 by the 5-metre telescope on Palomar Mountain.  New investigations by American journalist Jeff Kanipe show that the 'prominence' was a chance alignment by a passing asteroid.
The Arp 192 image is part of the Atlas of Peculiar Galaxies compiled by the astronomer Halton Christian Arp in 1966. The straight line shooting out from the galaxy was regarded as a so-called 'jet': a jet stream of matter from the core of the system.
After journalist Jeff Kanipe learned that an amateur photograph from 2008 found no trace of the "jet", he started his own investigation last year. It seems that even recent professional images of Arp 192 did not record the jet: the "jet" was gone.
Eventually it was realised that asteroid (84447) 2002 TU240, which incidentally was not officially discovered until 2002, was just in front of Arp 192 on the day the Palomar Mountain photograph was taken. As a tribute to this discovery, the asteroid now bears the name (84447)  Jeffkanipe.