Noin vuoden kuluttua voimme ehkä hämmästellä mahtavaa taivaanilmiötä, komeettaa jonka kirkkaus ylittää jopa täysikuun! Tämä tietysti jos komeetta ei aurinkoa lähestyessään kuivahda kasaan.
ISONin on laskettu ohittavan auringon vain vajaan 2 milj km eli 0.012 AU päästä 11/2013.
http://www.skymania.com/wp/2012/09/come ... html/6978/[size=150:2l614igi]Comet ISON set to be spectacular in 2013[/size:2l614igi]
Astronomers have discovered a new comet that looks like it could become a dazzlingly brilliant object at the end of next year, visible in broad daylight and hopefully sporting a spectacular tail when darkness falls.
The comet, discovered from Russia by the International Scientific Optical Network (ISON) on 21 September, is currently only visible in the world’s larger telescopes at magnitude +19 as it lies somewhere around the distance of Jupiter.
But calculations show that Comet ISON will pass less than two million km from the Sun at perihelion on 28 November, 2013, which is incredibly close, and could then reach a brilliant negative magnitude of between -11 and -16. That would put it between 100 and a few thousand times brighter than Venus, which is mag -5 at brightest, though its proximity to the Sun might make it difficult to see at its most brilliant. (The Full Moon is around mag -12.7).
But the close approach to the Sun could cause the comet, officially labelled C/2012 S1 (ISON), to break up and in any case such sungrazers can be extremely unpredictable. Comet Kohoutek was a famous example of such a celestial visitor in 1973 that failed to live up to the hype.
[size=65:2l614igi]Comet McNaught, displaying a fine tail in January 2007, photographed by S Deries from Chile. Credit: S Deries/ESO