SAI 175 anniversary . ... Moscow University . Search for in SAI Moscow University Search for in Russian astronomical resources . ... SAI Astronomical Databases . ... Browse SAI Software archive(ftp.sai.msu.su) . ASTRONET.RU - Russian Astronomical Network (available in translit also) . ... SAI Supernovae Research Group . ... Department of the Galaxy and Variable Stars (in Russian) . Sternberg Astronomical Institute Seminars . ... All-Russian Astronomical Olympiad (in Russian) . ...

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• SAI SN RESEARCH GROUP

... Bad Astronomy . ... Bitesize Astronomy . ... Last week's Snack talked about how black holes can affect the environment around them in such a way as to be very bright . ... It's a common misconception that black holes always have matter swirling into them. ... As this matter gets closer and closer to the black hole it piles up and a large, fairly flat disk forms. This is called the accretion disk , because matter from this disk accretes (that is, falls in) on the black hole. ... 2008 Phil Plait. ...

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... The TRACE images may be used without restrictions in publications of any kind. ... These two images, taken on 18 November 2000 at 15:54UT and 16:11UT, respectively, show such an event: the red circle in the image to the left shows a region where many loops are cooling, with bright loop tops (the intensity scales with the square root of the image to reduce the dynamic range). ... See also a collection of images related to the Sun, other cool stars, and solar-terrestrial effects . ... Images | ...

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• Martian Clouds
• Space History Introduction

... Here we point out that Compton heating of the intergalactic gas by the hard X-ray background (XRB), an effect neglected in all previous investigations, may help to resolve this discrepancy. ... 1 Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218 . 2 Also at Institute of Astronomy, Madingley Road, Cambridge CB3 0HA, UK . 3 Institute of Astronomy, Madingley Road, Cambridge CB3 0HA, UK . ... toolan@stsci.edu . ...

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• Processing of Observed Data
• Example Preprint entry
• WFPC2 Instrument Handbook Update

... About ATNF overview . ... Australia Telescope Steering Committee . ... LMC H II Region Luminosities versus . Observed Ionizing Stars . ... These values are compared to the observed H II region luminosities, yielding an estimate for the mean fraction of H-ionizing photons that escape the local nebulae in this sample. We formally estimate that, overall, 0-51% of the ionizing radiation escapes the local H II regions and is available to ionize the warm, ionized medium in the LMC. ...

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• VSOP Observing Schedule
• Source size measurement from observed quasar microlensing
• Australia Telescope National Facility

... A reconstruction method of 3D vector velocity field (three components of velocities) of gas in disks of spiral galaxies from observed line-of-sight velocity field is proposed. This method is based on Fourier analysis of observed velocity field. ... The knowledge of velocity field in spiral galaxies allows to clarify the nature of the galactic structures and mechanisms of their formation. ...

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• Fabry-Perot Interferometer: Gallery Old
• Observational Determination of the Nature of Galactic Spiral Arms (INASAN

... Fortunately, cold H I appears readily as H I self-absorption (HISA) shadows against warmer background H I . Though the HISA phenomenon was first observed in the 1950s, a detailed, systematic study of HISA clouds has only recently become possible with the advent of large-area synthesis surveys like the Canadian and VLA Galactic Plane Surveys. ... Stronger HISA appears concentrated in discrete cloud complexes associated with spiral arm structure. ...

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• AGES Observing Guide
• What is a pulsar?

... Tonight's Sky . ... Observing . ... Sky this Month . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Open cluster NGC 2818, spiral galaxy NGC 2964, and spiral galaxy NGC 2976 . ... Astronomy for Kids . ... Sky Events . ... Observing springtime deep-sky objects with a large telescope . ... Institute of Astronomy at Cambridge University, United Kingdom . ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter....

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• Why do some stars appear to flash a variety of different colors when you look
• Why do the constellations and the Moon appear upside down from the Southern
• Can you explain Mercury's retrograde motion? Do other planets appear to do this

M1 image More About M1 Nice Color Picture . ... M16 image More About M16 HST image . ... M31 image More About M31 Nice Color Picture . ... M42 image ; M43 image More About M42/43 Nice Color CCD Picture . M51 image More About M51 Color Image of M51 M51 Supernova . M57 image More About M57 Nice Color CCD Picture Very Deep M57 Image . ... M81 image More About M81 M81 Supernova Ultraviolet Image of M81 More about Ultraviolet Imaging . M82 image More About M82 M82 False Color M82 True Color . ...

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• THE HUBBLE LAW JAVA APPLET
• Astro-2 and the UIT Experiment

... Data Reduction FAQ > The reduced science spectrum displayed in the Reflex window appears good but when I try to plot it, it is quite different. How can I get it? ... Observing with ESO Telescopes . ... ESO-MIDAS . ... Reflex . ... ESO Data . ... ESO HST Image Galleries . ... ESO Data Access Policy . ... ESO Science Newsletter . ... ESO Annual Reports . ... Seminars at ESO Santiago . ... Seminars at ESO Garching . ... ESO Telescope Bibliography . ... Last Update: 01.04.14 ESO . ...

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• The Attic - Observing at airmass 4
• ESO - The Origin and Fate of the Sun: Evolution of Solar-mass Stars Observed
• ESO - While using Reflex I cannot see a spectrum in any of the three windows

... Circumstellar disc of beta Pictoris: constraints on grain properties from polarization. To appear in the Astronomy & Astrophysics . abs , src , ps ] . ... Dust influx to Titan from Hyperion . ... abs ] . ... Characteristics of bulges and disks in interacting galaxies . ... Dust grains around Herbig Ae/Be stars: porous, cometary-like grains? ... To appear in the Astronomy & Astrophysics Supplement . ... Finally, Links may lead you to more options (e.g. via the LANL preprint system). ...

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• Астрономия в Санкт-Петербургском университете |
• The Stellar Content and Distance to the Nearby Blue Compact Dwarf Galaxy