Halley's Comet . Spacecraft that have visited Halley's Comet . ... Then in 1984 and 1985, five spacecraft from the USSR, Japan and Europe were launched to make a rendezvous with Halley's Comet in 1986. ... This image is a mosaic of 8 images taken by the Giotto spacecraft during the Halley encounter on March 13, 1986. ... Courtesy NASA/JPL) . ... Halley's Comets in 1986 . This image of Halley's Comets was taken during its 1986 appearance. ... Cylindrical Map of the Nucleus of Comet Halley . ...

In 1705 Edmond Halley predicted, using Newton's newly formulated laws of motion, that the comet seen in 1531, 1607, and 1682 would return in 1758 (which was, alas, after his death). ... The average period of Halley's orbit is 76 years but you cannot calculate the dates of its reappearances by simply subtracting multiples of 76 years from 1986. ... Comet Halley will return to the inner solar system in the year 2061. more images . ... The Return of Halley's Comet from the ASP . ... Comets .. ...

I n 1705 Edmond Halley predicted, using Newton's newly formulated laws of motion, that the comet seen in 1531, 1607, and 1682 would return in 1758 (which was, alas, after his death). ... T he average period of Halley's orbit is 76 years but you cannot calculate the dates of its reappearances by simply subtracting multiples of 76 years from 1986. ... T he nucleus of Comet Halley is approximately 16x8x8 kilometers. ... The Return of Halley's Comet from the ASP . ... Comets .. Halley .. ...

Astronomy Picture of the Day . Comet Halley's Nucleus . ... 9.12.1996 . ... For all active comets except Halley , it was only possible to see the surrounding opaque gas cloud called the coma. During Comet Halley 's most recent pass through the inner Solar System in 1986, however, spacecraft Giotto was able to go right up to the comet and photograph its nucleus. ... Publications with keywords: nucleus - comet Halley . Publications with words: nucleus - comet Halley . ... Cold Comet Halley . ...

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Date RA 2000.0 Dec Delta R Elong m 1999 Jan 1 8 4.94 16 56.3 4.183 5.118 160.1 18.6 1999 Jan 8 8 0.40 17 8.8 4.157 5.123 168.1 18.6 1999 Jan 15 7 55.65 17 22.2 4.147 5.128 175.4 18.6 1999 Jan 22 7 50.85 17 36.0 4.153 5.133 173.9 18.6 1999 Jan 29 7 46.15 17 49.8 4.175 5.137 166.2 18.7 1999 Feb 5 7 41.72 18 3.2 4.213 5.141 158.2 18.7 1999 Feb 12 7 37.67 18 15.9 4.265 5.145 150.2 18.7 ...

... Tonight's Sky . ... The Magazine . ... Star Atlas . ... An artificial comet holds secrets to Earths life . ... Astronomy for Kids . ... Observing springtime deep-sky objects with a large telescope . ... The planet has extreme temperature swings and perhaps active lava flows. ... A digital supplement to Astronomy magazine. ... Join TravelQuest International with Astronomy and Discover magazines on one of three great tour options surrounding this celestial spectacle . ... Astronomy Magazine . ...

... Solar System . ... Sun . ... Comets . ... Some get thrown out of the solar system forever, whereas others end up on yet smaller orbits, visiting the inner solar system fairly frequently - such as comet Halley. ... When a comet moves into the inner solar system, this is heated by the Sun, and the ices turn into gas which forms the head or coma of the comet, which may be hundreds of thousands of kilometres across and visible from Earth. The most striking part of many active comets is the tail . ...

... The International Cometary Explorer ( ICE ) spacecraft has now had a close encounter of the best kind (the real kind) with Comet Giacobini-Zinner and has returned a host of useful scientific information. ... While Halley's Comet is too close to the Sun for observation, we can turn our attention to the Voyager 2 spacecraft's closest encounter with the planet Uranus. ... Planet A spacecraft (Japan) has its closest fly-by of Halley's Comet; distance = 100,000 to 200,000 km (60,000 to 120,000 mi) . ...

ПЕРЕЛ?К ПУБЛ?КАЦ?Й СП?ВРОБ?ТНИК?В ГАО . ... Kiselev N.N. Chernova G.P. Gerasimenko S.I. Photometric parameters of Halley's comet (1982i) based on B,V, R photometry. ... Kiselev N.N. Chernova G.P. Gerasimenko S.I. Observations of comets. ... Kiselev N.N. Chernova G.P. Observations of comets. ... Kiselev N.N. Chernova G.P. A'Hearn M.F. Circular polarization in comets. ... Kiselev N.N. Chernova G.P. Pushnin P.A. Siklitskij V.I. Polarimetry of comet Halley (1982i). ...

... An estimate the rotation period of cometary nuclei is important for understanding and describing the physical processes of the cometary activit