Comet ISON
Videos
Comet ISON, formally known as C/2012 S1, was a sungrazing comet from the Oort cloud which was discovered on 21 September 2012 by Vitaly Nevsky and Artyom Novichonok.
Comet ISON as captured by TRAPPIST on 15 November 2013
Comet ISON, imaged by the Hubble Space Telescope on 10 April 2013—near Jupiter's orbit; also, enhanced (coma model ratio) version
Comet ISON seen from the Mount Lemmon SkyCenter on 8 October 2013, as it passes through the constellation of Leo
Mount Lemmon Observatory
Videos
Mount Lemmon Observatory (MLO), also known as the Mount Lemmon Infrared Observatory, is an astronomical observatory located on Mount Lemmon in the Santa Catalina Mountains approximately 28 kilometers (17 mi) northeast of Tucson, Arizona (US). The site in the Coronado National Forest is used with special permission from the U.S. Forest Service by the University of Arizona's Steward Observatory, and contains a number of independently managed telescopes.
View of the telescopes on Mount Lemmon