... From the chain visibility point of view, it is very recommended to look at the Javascript movies , especially if the frame rate can be not regulated in your MPEG player. ... The non-CH-associated large-scale chains visible on the SOHO/EIT images at three wavelengths of 171, 195 and 284 as well as on the MLSO/HAO He I 10830 spectroheliogram of December 16, 1997. ... The SOHO/EIT movies at 171 and 195 show the chain dynamics on June 1-3, 1998. ... Javascript movie (230 KB), SOHO/EIT, 171 . ...

... Some existing (e.g., USNO-A1.0) and most of the upcoming catalogs (e.g., GSC-II SDSS , GAIA ) contain data for half a billion up to several billion objects. ... Here we present methods for structuring and searching very large catalogs to provide fast access to the coordinate domain of the parameter space. ... By generalising such methods it is also possible to produce catalog structures and indexes for accessing a multi dimensional parameter space. ...

... NGC 281 (Sharpless 184) is a bustling cradle of star formation about 10,000 light years away. ... The central stars are being formed from the surrounding gas, which emits a large amount of hydrogen alpha (Ha) light after being excited by stellar radiation. ... The dark areas overlaying the brighter ones in the middle of the image are dense clouds of gas known as Bok Globules. ... 4) Image registration . ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...

... The most spectacular view however is from space, where large areas of aurora can be observed simultaneously, even the entire polar cap. ... Such pictures often show a continuous ring of aurora around the polar cap (picture above), caused mostly by electrons leaking out along magnetic field lines, from the plasma sheet of the Earth's magnetic tail. ... Field lines from the auroral oval are believed to lead to the plasma sheet. ... A near-Earth circular polar orbit has many uses. ...

... Current APO Weather . ... Search Site . ... Information for New Users . ... Technical Staff pages . Night Logs and Mailing Lists (maintained by APO) . ... Technical Documents and Database Search . ... Observer's Documentation and Procedures . ... Problem Reporting and APO Technical Documents Database Search . ... APO Drawing/Document Management Procedures . ... APO Technical Documents Database Search . Home Astrophysical Research Consortium . ... Mail Lists (maintained by APO) . ...

"Dynamical friction and formation of structures: some cosmological aspects", Astroph. Space Sci., v.123, p.393-402, 1986 (with S.G.Simakov). "Accretion Mechanism of the Formation of Large Scale Structure of the Universe", Astron.Zh., vol.66, p225-231, 1989 (with S.G.Simakov). Back .

... Asteroid . ... In case you didn't hear about it, which you probably didn't: On Jan. 7, an asteroid 1,000 feet across -- nearly three times the current diameter of Marlon Brando -- barely missed the Earth, which is most likely your planet of residence. ... What if this asteroid had hit the Earth? ... As it happens, the American Astronomical Society was holding a conference in Washington AT THE VERY SAME TIME as the asteroid nearly hit the Earth. ...

MAIN PAGE . ... Nova Cygni August 1975! ... 1975/76: Comet West! ... Dr. Richard West (4th from left) & AAL members visiting SES Betzdorf on occasion of our club's 25th anniversary - October 1996 . Comet West Information . ... It was the brightest comet visible from Earth since Comet West in 1976. ... 1997: Comet Hale-Bopp! ... Thus Comet Hale-Bopp never got closer to Earth than Earth gets to the Sun. ... Comet Hale-Bopp JPL Page . ... 1999: Total solar eclipse over Luxembourg! ...

T he Siding Spring Survey (SSS) is a Near-Earth Object search program that utilises the 0.5-m Uppsala Schmidt Telescope at Siding Spring Observatory, N.S.W., Australia. ... The mission of the Siding Spring Survey is to contribute to the inventory of near-earth objects (NEOs), or more specifically, the potentially hazardous asteroids (PHAs) and comets (PHOs) that may pose a threat of impact and thus harm to civilization. ... Based on the CSS Mission page . ... Siding Spring Survey Main Page . ...

... Yes, Exploding Comet 17P/Holmes is one of the strangest things ever seen by astronomers - professional and amateurs alike. ... We also had some club members who received some Astronomical League awards...and we'd like to congratulate them! ... It is again a potluck, and is being held at the Masonic Temple in Galion ( 1252 State Route 598, Galion , OH 44833) Here's a map: Map of 1252 State Route 598 Galion, OH 44833-9367, US And, along with the party come RAS elections for 2008! ... Comet 17P/Holmes ...

Our publications in 2004 year Kniazev, Alexei Y.; Grebel, Eva K.; Pustilnik, Simon A.; Pramskij, Alexander G.; Kniazeva, Tamara F.; Prada, Francisco; Harbeck, Daniel . ... 704-727 (02/2004) . Kniazev, A. Y.; Grebel, E. K.; Pramskij, A. G.; Pustilnik, S. A. American Astronomical Society Meeting 204, #80.06 (05/2004) . Pustilnik, S.; Kniazev, A.; Pramskij, A.; Izotov, Y.; Foltz, C.; Brosch, N.; Martin, J.-M.; Ugryumov, A. Astronomy and Astrophysics, v.419, p.469-484 (05/2004) . ... 419.. ...

... Users . Connections (constellation) . ... Data Collection and Analysis . AAS 221 . ... The graph below represents the connections between users tweeting about the 221st meeting of the American Astronmical Society . ... The circles represent Twitter accounts; the color is coded based on the number of followers of each account using the scale given at the top of the graph (it's also included in the mouse-over text for each node), although I don't have this information for all users. ...

... Director of the RAS ISR . RAS Academician . ... Astrophysics module Kvant of the orbital complex Mir launched in 1987 contains the largest on the station complex of the scientific equipment named the orbital observatory Roentgen. Observatory Roentgen consists of 4 X-ray telescopes, jointly exceeding the range of energies from 2 to 800 keV. ... Among the most significant results that were received in the observatory Roentgen are: . ... measurement of the periods of 9 X-ray pulsars; . ...

. Pulkovo Observatory of Russian Academy of Sciences is situated . near Saint-Petersburg. It was founded in 1839. 196140, Saint-Petersburg, Pulkovskoye chaussee 65/1 . English version . Russian version . This page has been accessed times since May 1, 1999.

... Imaging of the core of the OMC-1 region using NICMOS camera 2 through the F212N and F215N filters shows a wide variety of interesting structure on scales of 0.2" at a very high dynamic range (Stolovy et al. ... The application of image restoration techniques, including multi-channel variants of the Richardson-Lucy technique, offers the chance to enhance structure on the finest scales and also to suppress the prominent and richly structured point-spread functions of the many bright stars in the...

Euro-Asian Astronomical Society . ... International Astronomy Olympiad . The First (Experimental) International Astronomy Olympiad was carried out by Euro-Asian Astronomical Society and took place at the Special Astrophysical Observatory of Russian Academy of Sciences (SAO RAS) in North Caucasus on November 1-8, 1996. ... Why is it sometimes better to use a small telescope in orbit around the Earth than it is to use a large telescope on a mountain top? ... Grades 11-12 . ... Russia) . ...

Asteroid 2055 YU55 passes close by Earth; how close did it get? ... As Elizabeth Flock reported: An asteroid the size of an aircraft carrier missed Earth by only 200,000 miles as it flew by Tuesday night the closest an asteroid has been to Earth in 200 years Asteroid 2005 YU55, as it has been dubbed, streaked by at about 30,000 mph, but some scientists and lucky amateur astronomers caught a glimpse in their telescopes, where they saw strange structures on the asteroid\u2019s dark-colored surface. ...

M87 Gas Disk and Optical Jet (STSci) . SEDS Messier Catalogue M87 Page (U. Arizona) . Black Hole and Jet in M87 (NASA/GSFC) . ... The large scale radio structure is shown in the 3CRR Atlas . Richard White's Virgo Cluster page has optical and X-ray images of the large-scale environment of M87 . ... HST Observes Distant Radio Galaxies (STScI) . HST Finds a Black Hole in NGC4261 (STScI) . HST finds a Bare Black Hole Pouring out Light in NGC6251 . ... Alan Bridle's Home Page . ...

... Bad Astronomy . ... Mad Science . ... Site Info . ... Public Talks . ... Keep Bad Astronomy close to your heart, and help make me filthy rich. ... Who is this guy who calls himself "The Bad Astronomer?" ... First, yes, I am a real live astronomer (when people ask me what astronomers do, I tell them "They astronom !" ... These are emitted by powerful objects like black holes, exploding stars, and super-dense neutrons stars. ... Finally, am I really a bad astronomer? ... 2008 Phil Plait. ...

... Exposure Time Calculator (ETC) . Survey processing . ... VISTA is a 4-m class wide field survey telescope for the southern hemisphere, equipped with a near infrared camera (1.65 degree diameter field of view at VISTA's nominal pixel size) containing 67 million pixels of mean size 0.34 arcsec and available broad band filters at Z,Y,J,H,K s and a narrow band filter at 1.18 micron. A wide field visible camera, if constructed, could also be used on VISTA. ... Tile . ... ESO VISTA Public Surveys . ...