Comet ISON, lower right, closes in on the sun Wednesday, Nov. 27, 2013, in this view from the Solar and Heliospheric Observatory spacecraft operated by the European Space Agency and NASA. In this view from a coronagraph, the sun, represented by the white circle, is blocked out to make its corona, or outer atmosphere, easier to see. ESA/NASA
(USA TODAY) -- Scientists are still determining how much of Comet ISON survived its
annihilating Thanksgiving journey around the sun, but they believe it's
now probably "only dust," NASA said Monday.
"There's no doubt that
the comet shrank in size considerably as it rounded the sun, and
there's no doubt that something made it out on the other side to shoot
back into space," the agency wrote.
"The question remains as to whether the bright spot seen moving away
from the sun was simply debris, or whether a small nucleus of the
original ball of ice was still there."
By Sunday, the remainder of the nucleus of the "comet of the century" was likely pulverized.
obituary was written after it passed within 684,000 miles of the sun
Thursday, but images from the solar observatory released the next day
showed some part of the 4.5-billion-year-old icy space rock heading back
Confirming what exactly happened to ISON come later this month during observations by the Hubble Space Telescope.
comet watchers will be eyeing the pre-dawn horizon later this week -
Friday or Saturday - for any possible trace of ISON's zombie tail. But
don't get your hopes up, Karl Battams of the Naval Research Laboratory warns in a question-laden eulogy - with a final caveat:
"We all need to keep in mind how ISON keeps surprising us," he writes.
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