... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. July 15, 1998 . Ghost Galaxy NGC 2915 . ... In visible light, shown above in yellow, this galaxy appears to be a normal dwarf galaxy , as indicated by the yellow smudge in the image center. Yet when imaged in a very specific color, shown in blue, a whole spiral galaxy appears. ... About APOD > . ... Specific rights apply . ...

Blackholes2 Forum Message . Forums: . Atm ћ Astrophotography ћ Blackholes ћ Blackholes2 ћ CCD ћ Celestron ћ Domes ћ Education . ... Discussion Forums | Blackholes II | Post . ... What's New About Ghosts . Forum List | ... Post Message | ... Login to Post . ... www.astronomy.net . About Astronomy Net | Advertise on Astronomy Net | ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

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MESSIER 5 AND ITS VARIABLES `A noble mass, refreshing to the senses after searching for faint objects' Admiral Smyth The oldest known stars have survived chiefly in the rich and wonderfully symmetric formations called globular star clusters. ... 2] Charles Messier revealed the globular cluster on May 23, 1764. ... The globular cluster itself is magnificient and granular at 60x. Individual small stars are scattered around the edges, and one or two of them can exceed the others in brightness. ...

В&K : . ... О церковном календаре . ... Деяния совещания глав и представителей автокефальных православных Церквей в связи с празднованием 500-летия автокефалии Русской Православной Церкви . ... Иванов А.В. Несколько замечаний по поводу статьи В.А. Уварова "К вопросу о датировке православной пасхалии" . ... Лаврус В. История календаря . ... Часто задаваемые вопросы о календарях Русский перевод версии 2.4 от 28 октября 2001 г. Уваров В.А. К вопросу о математической датировке православной пасхалии . ...

... Tonight's Sky . ... Observing . ... Sky this Month . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... The Golden Earring, planetary nebula NGC 2867, and barred spiral galaxy NGC 3109 . ... Astronomy for Kids . ... Observing Basics . ... Capturing a ghostly green bubble . ... Only registered members of Astronomy.com are allowed to comment on this article. ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter...

Astronotes Armagh Planetarium's Stellar Blog! ... Sun . ... There could be an eighth planet to discover! ... The orbits of the planets could be predicted perfectly- apart from Mercuryт??s. Planetary orbits are not circles, but ellipses and Mercuryт??s orbit was the least circular (or most т??eccentricт??) known. ... Vulcan, according to Le Verrier, orbited the Sun every 19.7 days at an average distance of 21 million km (0.14 au), a little over a third of Mercury?s average distance from the Sun. ...

... 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 awsome spectacle of a brilliant comet, with its long ghostly tail streaming behind it, is a rare event. ... Only one other comet, Comet Halley, was seen so far from the Sun, giving scientists an opportunity to watch it as it slowly warmed up and sprouted a tail. ... Comets are the Rip Van Winkles of the solar system -- mini-worlds that have changed little during their 4.5-billion-year nap far from the Sun. ... Observing Comets . ... Once, comets inhabited the entire solar system. ...

... Bad Astronomy . Misconceptions . ... I staggered groggily back into my room, and headed into the bathroom to shower. ... There was a face in the shower curtain, looking directly at me . ... With terrible certainty, I knew that this was the face of a dead man, come to see me in the shower. ... Lenin. ... What's going in here is that the face of "V.I. Lenin" is in fact water from my arm that got absorbed by the lining of my shower curtain when I opened it to get my towel. ... 2008 Phil Plait. ...

Using the Parkes Multibeam to Search for HVC Analogs D.J. Pisano (ATNF) with David Barnes (Melbourne), Brad Gibson (Swinburne), Lister Staveley-Smith (ATNF), Ken Freeman (RSAA/ANU) Possible analogs to Local Group HVCs courtesy B. Wakker Blitz et al. (1999) and Braun & Burton (1999) suggest that some HVCs have median distances of 500 kpc ­ 1 Mpc and HI masses of 106-7 M0. ... The Local Group of galaxies is a loose group. ... Multibeam Observations of LGG 93, 180, & 478 Group Galaxies Velocity Area Vel. ...

Space Agencies and Centres . Space research . ... BNSC - British National Space Centre . ... CNES - Centre National d' tudes Spatiales, France . ... NASDA - National Space Development Agency (Earth Observation Center), Japan . ... NASA Spacelink , includes information about the Mir station . ... John F. Kennedy Astronomy Observatory , contains rich list of astronomy sites . ... LIFE Magazine Space Links . ... Copyright RSSI 1993-1997, Space Research Institute RAS Network Information Centre ...

McGregor, P. J., Conroy, P., Bloxham, G., van Harmelen, J. 1999, PASA, 16, 273: "Near-infrared Integral Field Spectrograph (NIFS): An Instrument Proposed for Gemini" ( ADS , pdf ). ... McGregor, P. J., Hart, J., Conroy, P., Pfitzner, L., Bloxham, G., Jones, D., Downing, M., Dawson, M., Young, P., Jarnyk, M., van Harmelen, J. 2002, SPIE, 4841-178: "Gemini Near-infrared Integral Field Spectrograph (NIFS)" ( pdf ). ... Publications * Team Members * Internal Project Links * . ...

... ARC 3.5m | TripleSpec . ... Fowler sampling, read noise, and minimum integration time . ... The integration time for the slit viewer is adjustable, but 30 seconds represents a maximum practical integration for positioning the source and for guiding. Longer integration times are possible, but the delay between exposures makes guiding and/or positioning the source on the slit tedious. ... Decide on your guider integration time and acquire a frame to serve as the background image with "Expose". ...

... 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...

... Telescopes ћ Binoculars ћ Microscopes . How to Select the Right Binocular . Meade Sports Optics Support . ... Most commonly, binoculars utilize either porro prisms or roof prism s for this purpose. ... Example: The Meade 8x42mm Waterproof roof prism binocular has a field of view 367 ft. wide for an object 1000 yards distant from the observer, yielding a field of view specification of 367 ft. at 1000 yds. ... Example: Meade 8x21mm Folding Roof Prism. ... Meade Binoculars Instruction Manual . ...