In the
movie, Comet ISON seems to be falling apart
as it approaches the sun. Indeed, researchers working
with NASA's Solar Dynamics Observatory said they
saw nothing along the track that ISON was expected
to follow through the sun's atmosphere. Nevertheless,
something has emerged.
Whether this is a small scorched fragment of Comet
ISON's nucleus or perhaps a "headless comet"--a
stream of debris marking the remains of the comet's
disintegrated core--remains to be seen.
An earlier movie from SOHO shows more
of the comet's approach:
The movie spans a day and a half period
from Nov. 27th (01:41 UT) to 28th (15:22 UT). We
see that Comet ISON brightened dramatically on Nov.
27th before fading on Nov. 28th. That brightening
might have been a disintegration event, in which
the comet cracked open and spilled its vaporizing
contents into space.
In summary, we still don't know for
sure what has happened to Comet ISON. Stay tuned
for updates as more data arrive from NASA's fleet
of solar observatories.
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