Comets ISON and Encke updates and DEC Astronomy Update 26NOV2013

Comets ISON and Encke updates and DEC Astronomy Update 26NOV2013

Comet Ison 2013
Image Credit- NASA

NASA Hosts Nov. 26 Teleconference and Nov. 28 Hangout to Discuss Comet Nearing SunNASA will host a media teleconference Tuesday, Nov. 26 and a Google+ HangoutThursday, Nov. 28 to discuss Comet ISON's journey through our solar system and what the public worldwide may see in the coming days as the comet traverses the sun on Thanksgiving Day....To join the Hangout, visit:http://go.nasa.gov/IiODhsLive audio of the teleconference will be streamed at:http://www.nasa.gov/newsaudioFor NASA TV streaming video, downlink and scheduling information, visit:http://www.nasa.gov/nasatv--------------------------

A Tale of Two Comets: MESSENGER Captures Images of Encke and ISON
MESSENGER Mission News- November 25, 2013
On November 18, NASA's Mercury-orbiting MESSENGER spacecraft pointed its Mercury Dual Imaging System (MDIS) at 2P/Encke and captured this image
<http://messenger.jhuapl.edu/gallery/sciencePhotos/image.php?image_id=1303>
of the comet as it sped within 2.3 million miles (3.7 million kilometers) of Mercury's surface. The next day, the probe captured this companion image  <http://messenger.jhuapl.edu/gallery/sciencePhotos/image.php?image_id=1304>
of C/2012 S1 (ISON), as it cruised by Mercury at a distance of 22.5 million miles (36.2 million kilometers) on its way to its late-November closest approach to the Sun. MESSENGER's cameras have been acquiring targeted observations
<http://messenger.jhuapl.edu/the_mission/movies/MESSENGER_observes_Encke_and_ISON.mov>
of Encke since October 28 and ISON since October 26, although the first faint detections  <http://messenger.jhuapl.edu/news_room/details.php?id=245> didn't come until early November. During the closest approach of each comet to Mercury, the Mercury Atmospheric and Surface Composition Spectrometer (MASCS) and X-Ray Spectrometer (XRS) instruments also targeted the comets. Observations of ISON conclude on November 26, when the comet passes too close to the Sun, but MESSENGER will continue to monitor Encke with both the imagers and spectrometers through early December. ...
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