Latest videos: Comet ISON still on course for slingshot around the Sun
The comet's entrance coincides with a bright CME racing away from the sun's southwestern limb. Astronomers have been wondering what might happen if a CME strikes Comet ISON. This CME, however, will probably miss. The source of the cloud is a farside active region, which is not directly facing the comet.
NASA's STEREO-A spacecraft is also monitoring the comet.
"I will admit that I was pretty worried yesterday morning when reports of lower production rates came in," says Matthew Knight of the Lowell Observatory and NASA's Comet ISON Observation Campaign. "However, the STEREO-A brightness has increased steadily over the subsequent 36 hr, and I'm more optimistic again. My off-the-cuff thought is that there was an [outburst of dust, which dampened the emission lines] from roughly Nov 20-22, and it has returned to brightening again."
Astronomer Karl Battams of NASA's Comet ISON Observing Campaign urges readers to remember the following: "Comet ISON is a dynamically new sungrazing comet, fresh in from the Oort Cloud, and the last time we saw an object like this was never! Furthermore, a sungrazing comet just days from perihelion has never been studied in this kind of detail - we're breaking new ground! When we factor in your standard 'comets are unpredictable' disclaimer, what we have is a huge recipe for the unknown."
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Nasa has released a 'Thanksgiving Day' video of Comet ISON as it continues in its perilous course towards the surface of the sun. The comet is said to be brightening steadily as it moves closer to our star, where it will skim within 750,000 miles of the solar surface. Under the enormous pressure and heat of the Sun it is still possible the comet...
In the early hours of Nov. 27, 2013, Comet ISON entered the field of view of the European Space Agency NASA Solar and Heliospheric Observatory. In this picture, called a coronagraph, the bright light of the sun itself is blocked so the structures around it are visible. The comet is seen in the lower right a giant cloud of solar material, called a...
( via spaceweather.com )
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