(quote from Digg.com)
Astronomers have witnessed a never-seen-before event in observations by ESA’s XMM-Newton spacecraft – a collision between a pulsar and a ring of gas around a neighbouring star.
The rare passage, which took the pulsar plunging into and through this ring, illuminated the sky in gamma- and X-rays.
Not a lot I can add except to say this is very interesting – even if space stuff bores you!