NATIONAL ASTRONOMY AND IONOSPHERE CENTER . ... Astronomy . ... Visitor Center . ... Comets . ... Observing conditions were favorable at Arecibo July 5-15 2001, and observing time for both spectroscopy of 18-cm OH lines and S-band radar observations were arranged. The comet nucleus was observed to split into two pieces on April 30. ... Because the comet passed within 0.25 AU of the Earth in early July, when it was visible from Arecibo Observatory, it was fairly well suited to radar observation. ...

... Centaurus A : 15,000,000 light years away, in the constellation Centaurus, the closest AG to Earth . ... Astronomers think that the reason for the unusual shape of this galaxy is because hundreds of millions of years ago two galaxies, one dusty spiral and one bright ellipictal, collided causing a massive black hole in the middle and bright emmision of light. ... Andromeda galaxy: 2.8 million light years away, closest spiral galaxy to earth, farthest object one can see without a telescope. ...

... To save time, I will only provide ephemerides in 2000 coordinates. ... Note: most the orbital elements used to create these ephemerides were obtained from the International Astronomical Union Circulars (IAUCs), Minor Planet Circulars (MPCs) or the ICQ Comet Handbook. ... The following 1-day ephemeris (March 1, 1997 - October 1, 1997) is from Donald Yeomans of JPL and is based on Reference Orbit #55 (March 4, 1997). 2000 coordinates (March - September, 1997) [3/4/97] . ... Epoch: 1997 Feb. 1.0 . ...

... We present a computer program for modelling energy flux distribution and light curves of eclipsing binaries from far ultraviolet to infrared regions. The Roche model is assumed. Proximity effects of components (reflection of radiation and surface gravity darkening) are taken into account. ... Figure 1: The surface temperature distribution for Algol A-B system before (upper plot) and after (lower plot) correction for temperature due to the irradiation effect. ...

Having studied the solar corona and its radio emissions sunspot cycles ago, I was keen to verify its existence optically during the total solar eclipse of Wednesday, 4 December 2002, the first on Australian soil since 1976. The moon's shadow was to travel from the south-Atlantic west of The Congo, across southern Africa, the Indian Ocean and into the Great Australian Bight, finally making Australian landfall at Ceduna, South Australia (SA). ... The favoured site to observe the eclipse was Ceduna. ...

... In typical nightly use, the wide field and planetary telescope and cameras record images of favorably placed objects in the sky, including constellations, bright variable stars, nebulae through narrow-band filters, comets, the Moon, and planets. ... Shared Skies telescopes are available for use by students at the University of Louisville and the University of Southern Queensland, and by teachers and students in middle and high schools mentored by faculty at the universities. ...

... Solar Data: f.e. X-ray . Night Sky Live . ... Heavens-Above: Sky chart, Satellites, Iridiums and astronomical objects For Moscow For SAO Baksan . ... ESO-MIDAS page . ... Tutorials for Astronomy . ... Asteroid and Comet Hazard . ... Observable Comets: This page lists links to orbital elements and ephemerides of (potentially) observable comets. ... Leonid page - a lot of information for years Comets and Meteor Showers . The American Meteor Society . ... North American Meteor Network Home Page . ...

... click image to view discuss) . ... Bert improved his composite image showing details of the corona. ... He also did a better job of color correction, avoiding a false light bluish hue that was present near the 6 o'clock position on the moon's limb in the earlier image. ... of this image is the seventh-magnitude star SAO 109216. Submitted by Bernie Volz on 05/08/2006 22:12:59 . ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...

... Bad Astronomy . ... Bad Astronomy : Comets whiz across the sky in a few seconds. Good astronomy : Comets appear to move very slowly, usually taking days to noticeably move. ... The orbital periods of comets are measured in years; the most famous comet of all, Comet Halley (usually--- and incorrectly-- called ``Halley's Comet''), takes about 76 years to orbit the Sun just once. ... Now, when a comet gets near the Earth, it tends to be moving pretty quickly. ... Want to know more about comets? ...

NMW survey overview . Access image archive . ... The New Milky Way survey aims to detect bright (V<13.5) optical transients near the Galactic plane using an automated wide-field (8x6 deg.) system capable of surveying the whole Milky Way area visible from the observing site in one night. ... All images obtained during the transient search survey are available online (please use the image archive access form ). ... Images per field: . ... Images per night: . ... Milky Way imaging time: . ...

... TAIL . ... 1997 3 09.82 . ... 4.5 . ... GUR . ... Mar 9.82: bright arcs visible near nucleus (on the south, sunward side). Mar 13.63: arcs.. ... CCD ST6 + F=110mm, 1:4 lense: Dia=27', ion tail in PA 348 deg. and dust tail in PA 321 with sinchrones:some brightest are inclined in PA 328, 327 and 332 deg.. Mar. 19.61: 3 arcs in the sector near the nucleus in PA 163 up to 278 deg., brightest part in PA 237 deg., distanse between arcs approx. 30", full size of whole this structure about 2'. ...

Wide-angle telescopes for photometry and polarimetry in optical and infrared ranges . ... Investigation of the Earth’s atmosphere, comets, interplanetary and interstellar medium with brightness and linear polarization measurements of extended sources and sky background in optical and infrared spectral ranges. ... The devices are small diameter telescopes with CCD-detectors for optical and infrared spectral range with spectral and polarization filters. ... 15-cm telescope with cooling down to 80 K . ...

. The Planet's Parade . The Hale-Bopp Comet . The Ikeya-Zhang Comet. Sergey Nazarov's Foto . Ursa Major . The Young Moon . The Moon. Andrew Zolotukhin' s Foto . 2003 May 07: Transit of Mercury . Home | My Telescope | Introduction | Links .

OBSERVATIONS OF COORBITAL SATELLITES OF SATURN Emel'yanov N., Varfolomeev M. Sternberg State Astronomical Institute, Moscow, e-mail : emelia@sai.msu.ru Institut de MИcanique CИleste et de Calcul des иphИmИrides, Paris, e-mail : emelia@imcce.fr Abstract. To improve the orbital parameters and masses of coorbital satellites of Saturn, Janus and Epimetheus, new observations of these satellites are necessary. ... IN: Saturn. ... New observations of Saturn's coorbital satellites" - Icarus. ...

. This color image was obtained with Fuji color film (Super Plus 400) in focal plane of the 70-cm reflector (F = 27 m) at Lisniki Observatory by A.M.Evtushevsky. Data and time of observation: April 27, 1997, 21:25 LT. Comet-Earth distance: 1.7 a.u. Time of exposure: 10 min. Field of view : 3 minutes of arc. Distance between shells, in average: 15 000 km. Diameter of bright coma in the picture center: of about 5 000 km. Last updated: January, 2005.

... Tour Objects Tours can be created using objects from within the Autostar database or a user can enter in different objects (such as a newly discovered comet). ... Automatic Mode: As the user advances to each object, the title of the object appears on line 1 of the display while its descriptive text automatically starts scrolling across line 2. ... For example: STAR "Rigel" LANDMARK az alt "title" "description" Enter the azimuth (az) for the desired object in the following format xxxdxxmxxs. ...

... Invisible airwaves crackle with life Bright antenna bristle with the energy Emotional feedback on timeless wavelength Bearing a gift beyond price, almost free All this machinery making modern music Can still be open-hearted. ... You can choose a ready guide in some celestial voice. ... SONG: Different Strings Who's come to slay the dragon, Come to watch him fall? ... Tide Pools When the ebbing tide retreats Along the rocky shoreline, It leaves a trail of tidal pools In a short-lived galaxy. ...

... Ciel Espace, le magazine qui vous guide toujours plus loin . ... des reportages . ... les plus belles images de l'Univers d–їcrypt–їes pour vous . ... Accueil Eclipse partielle de Soleil –Љ lвАЩhorizon . ... C'est ce qu'on appelle une –їclipse de Soleil . ... Pour avoir tous les horaires pr–їcis et la portion de Soleil –їclips–їe en fonction de la ville dans laquelle vous vous trouvez, vous pouvez consulter l'article d' Emmanuel Beaudoin consacr–ї –Љ l'–їv–їnement dans Ciel et Espace de janvier 2011...

... MASTER Net is 56 square degrees per 1 exposition . ... 06 Dec 2015: GRB 151205B: MASTER-NET early optical observations GCN18665 . ... 18 Nov 2015: GRB 151118A: MASTER-NET optical observations GCN18613 . ... 12 Nov 2015: GRB 151112A: MASTER-NET optical limit GCN18591 . ... 07 Nov 2015: GRB 151107A: MASTER-NET optical observations GCN18565 . ... 31 Oct 2015: Five OTs detected by Global Robotic MASTER Net ATel8232 . ... 02 Oct 2015: GRB 151001B: MASTER-NET early optical observations GCN18380 . ...