Comets
"We are very well acquainted with the trajectory of Comet 73P Schwassmann-Wachmann 3," said Don Yeomans, manager of the agency's Near-Earth Object Program, at Jet Propulsion Laboratory. "There is absolutely no danger to people on the ground or the inhabitants of the International Space Station, as the main body of the object and any pieces from the breakup will pass many millions of miles beyond the Earth."
David Jewitt and Henry Hsieh have dubbed the new population "main belt comets". They describe three objects with near circular, flat orbits in the asteroid belt that stream volatile materials, producing an observable tail for weeks and months at a time.
The finding backs a theory that ice-bearing asteroids - or "comets" - from this much closer region may have played an important role in forming the Earth's oceans.
For no apparent reason, the comet's nucleus split into at least three "mini-comets" flying single file through space. Astronomers watched with interest, but the view was blurry even through large telescopes. The comet was a hundred and fifty million miles away.
We're about to get a much closer look. In May 2006 the fragments are going to fly past Earth closer than any comet has come in almost eighty years.
Astrobiologists will today continue to examine traces of matter that poured its blood-red deluge over the Indian state of Kerala for two whole months in 2001.
But the snow -- containing dust or sand from the desert regions of northern China -- could pose a health hazard, the country's meteorological office warned.
"It's tough to say whether it's yellow sand mixed in snow or if it's snow mixed in yellow sand," a met official told Reuters.
A high concentration of the dust particles prompted the weather bureau to issue a yellow dust warning for the second time in three days.
South Korea frequently gets sand or dust storms, but a yellow snow storm is very rare.
A new analysis of data from NASA's Deep Impact mission last year provides the first evidence that water ice can indeed exist on a comet's exterior.
"But, of course, we see other objects -- stars and comets. This time, the first time, I saw a new comet," the postdoctoral researcher said.
Bernardi was looking at images taken with the Canada-France-Hawaii Telescope on Mauna Kea when he noticed an object that was "a bit fuzzy," with a tail estimated at more than 13,000 miles long.
Comment: None of this hoopla has happened before when a comet when sailing by the planet. NASA just stated it wasn't a threat, and that was that. If they are so confident that none of the 73P fragments will hit, why are they scrambling all their resources this time "to provide further reassurances"??