Comets


Meteor

Comet dust build-up? South Korea gets rare yellow snowfall

Seoul - South Koreans were treated to a rare weather phenomenon on Monday when yellow snow fell in the capital and elsewhere across the country.

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.

Green Light

Green Comet

"Comet Pojmanski (C/2006 A1) has a bright green head," says Chris Schur who took this picture yesterday at dawn from Payson, Arizona.

Meteor

Water ice detected on comet's surface

Scientists have long known that a major ingredient in comets is water ice, but they were unsure whether the ice was contained mainly inside or if it could be found on the surface as well.

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.

Telescope

UH astronomer finds new comet

University of Hawaii astronomer Fabrizio Bernardi came here from Italy to look for potentially dangerous asteroids.

"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.