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Hybrid comet-asteroid in mysterious break-up 09:30 11 April 2006 NewScientist.com news service Jeff HechtThe large, diffuse breakaway object is centred at the 2 o'clock position relative to the nucleus. The image is a negative, with the darkest areas representing the brightest objects. Something substantial has broken off an icy 50-kilometre object beyond the orbit of Saturn, leaving puzzled astronomers trying to figure out why. Comets have been seen breaking up before, but only after heating when passing close to the Sun or a gravitational disturbance following a close encounter with a planet. However, at 1.9 billion kilometres, this object is...

Chunks of a comet currently splitting into pieces in the night sky will not strike the Earth next month, nor will it spawn killer tsunamis and mass extinctions, NASA officials said Thursday. The announcement, NASA hopes, will squash rumors that a fragment of the crumbling Comet 73P/Schwassmann-Wachmann 3 (SW 3) will slam into Earth just before Memorial Day. "There are some Internet stories going around that there's going to be an impact on May 25," NASA spokesperson Grey Hautaluoma, told SPACE.com. "We just want to get the facts out." Astronomers have been observing 73P/Schwassmann-Wachmann 3, a comet that circles the...