Comet ISON fools astronomers and comes out alive at the other side of the SUN (UPDATED)

UPDATE NOVEMBER 30, 2013. As Comet ISON pulled away from the sun over these past couple of days, it first brightened and then faded again. It now seems unlikely we will get any good view of Comet ISON in our skies this December. Personally, I still hold some slim hope that the comet will surprise us again.

Source: earthsky.org

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Surprisingly, Comet ISON survives encounter with the Sun.

Surprisingly, Comet ISON survives encounter with the Sun.

Contrary to what we’ve publishes here before, Comet ISON is still alive.

According to NASA’s site:

Continuing a history of surprising behavior, material from Comet ISON appeared on the other side of the sun on the evening on Nov. 28, 2013, despite not having been seen in observations during its closest approach to the sun.

As ISON appeared to dim and fizzle in several observatories and later could not be seen at all by NASA’s Solar Dynamics Observatory or by ground based solar observatories, many scientists believed it had disintegrated completely. However, a streak of bright material streaming away from the sun appeared in the European Space Agency and NASA’s Solar and Heliospheric Observatory later in the evening. The question remains whether it is merely debris from the comet, or if some portion of the comet’s nucleus survived, but late-night analysis from scientists with NASA’s Comet ISON Observing Campaign suggest that there is at least a small nucleus intact.

Throughout the year that researchers have watched Comet ISON – and especially during its final approach to the sun – the comet brightened and dimmed in unexpected ways.  Such brightness changes usually occur in response to material boiling off the comet, and different material will do so at different temperatures thus providing clues as to what the comet is made of.  Analyzing this pattern will help scientists understand the composition of ISON, which contains material assembled during the very formation of the solar system some 4.5 billion years ago.

Lou

Filed in: Astronomy, Exothings Tags: , ,

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