The Next apparition of Halley's Comet

Radar observations of Comet 2P/Encke during the 2003 apparition

The nucleus of Comet 2P/Encke was detected with the Arecibo radar during the close approach of November, 2003, making this the first comet to yield radar detections at two different apparitions. Although the measured radar cross section of 1.0 km2 was close to that obtained in 1980, the Doppler bandwidth was nearly four times larger. Most of this bandwidth difference can simply be attributed to...

Return to Comet Tempel 1: Overview of Stardust-NExT results

Return to Comet Tempel 1: Overview of Stardust-NExT results J. Veverka a,⇑, K. Klaasen , M. A’Hearn , M. Belton , D. Brownlee , S. Chesley , B. Clark , T. Economou , R. Farquhar , S.F. Green , O. Groussin , A. Harris , J. Kissel , J.-Y. Li , K. Meech, J. Melosh , J. Richardson , P. Schultz , J. Silen , J. Sunshine , P. Thomas , S. Bhaskaran , D. Bodewits , B. Carcich , A. Cheuvront , T. Farnham...

Apparition: Intelligent Assistance for Crowdsourcing

Two-layer API: • The Browser: C++ API; audio capture, video capture, noise cancellation and noise reduction. Helps browser makers easily implement the Web API. • The Web: Used by the third party developers to develop web based video chat applications. Uses WebRTC, an open framework for real time communications in the browser. • The process of making the illusion of motion and change by rapidly ...

The Apparition Dates of the Andromede (or Bielid) Meteor Swarms.

Speculations on the possible causes of the Whymper apparition.

During the first ascent of the Matterhorn, a remarkable optical effect comprising three crosses surrounded by a great arch was observed by Edward Whymper, the British mountaineer. The authors review previous published explanations of the apparition. There are no photographs, only a woodcut and sketch, so the size of the apparition is not known, and it is not possible to make a definitive conclu...