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The Urban Astronomer

Comet ISON at Perihelion on Thanksgiving Day 2013

28 Nov 2013, 14:53 UTC
Comet ISON at Perihelion on Thanksgiving Day 2013
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Today is the big day when ISON flies by the Sun ("perihelion"), and all eyes are on NASA's SOHO spacecraft that is watching the event first-hand.For up-to-the-minute web resources, I recommend the following sites.Google Hangout with NASASpaceWeather.comSky & TelescopeEarthSky.orgNASA Comet ISON Observing CampaignAs of 7:00 am pacific time, it seems that the brightness of Comet ISON dropped somewhat, as reported on Spaceweather.com and Sky & Telescope.There is concern that the very active Sun could release a Coronal Mass Ejection (CME) as ISON is at closest approach and this would be a very substantial threat to ISON's survival.More to come.

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