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Article by William Newcott republished from the National Geographic magazine.
News, recent observations, observing information and advice.
A list of comets discovered by Canadian astronomers.
Downloadable catalog. Also news, reading list, articles, links.
From the Smithsonian Astrophysical Observatory. News, observations, orbital data, comet names and designations, links.
News, observations, analyses of current comets, images, archives, links.
Overview provided by David Jewitt, an astronomer at UCLA.
History, orbits, composition, ways comets are studied, relation to meteor showers. Comets Halley, Shoemaker-Levy 9. From the National Air and Space Museum.
Informative illustrated explanation of what comets are, what they are made of, where they come from and how to observe them.
Updated news letter on observation opportunities, designation of names and discoveries. Includes observation data and links.
Offers updated orbital data, lists and orbit diagrams. Includes near Earth objects and minor planets.
The original discovery and latest news about a new class of interplanetary bodies.
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