今天 (美東 20131203) 下午三點新聞:

Update: Comet ISON dead at 4.5 billion years old

Updated 3:00 p.m. EST | NASA confirmed Tuesday that Comet ISON did not survive its journey around the sun, vaporized by solar radiation.

"Though the exact time of ISON's death is uncertain, it does appear to be no more," C. Alex Young of the NASA Goddard Space Flight Center told AFP in an email, "All that is left is a cloud of debris without a nucleus."

In a memoriam on NASA's Comet ISON Observing Campaign website, Karl Battams writes that the celestial body was "born 4.5 billion BC, fragmented Nov. 28, 2013 (age 4.5 billion yrs old)."