... 2013 November 18 . Aurora and Unusual Clouds Over Iceland . ... On the far left, bright green auroras appear to emanate from the glacier as if it was a volcano . ... On the far right is a long and unusual lenticular cloud tinged with green light emitted from another aurora well behind it. Just above this lenticular cloud are unusual iridescent lenticular clouds displaying a broad spectral range of colors. ... Happy Holidays: Free APOD 2014 Calendar in PDF format . ... About APOD | ...

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• APOD: 2005 August 8 - Mars to Appear Normal this August
• APOD: 2003 August 13 - Mars Rising Behind Poodle Rock
• APOD: 2006 April 30 - 1006 AD: Supernova in the Sky

Astronomy Picture of the Day . Jet Approaching a Crescent Moon . ... On the left, an airplane cruises through the atmosphere leaving a contrail in its wake. ... The above image is framed by an eerie gray sky, too close to day to be blue, too close to night to be black. ... NASA Web Site Statements, Warnings, and Disclaimers . ... U. Based on Astronomy Picture Of the Day . Publications with keywords: Moon . Publications with words: Moon . ... Bright Planets, Crescent Moon . ...

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• Астронет > Jet Approaching a Crescent Moon
• Journal "Peremennye Zvezdy"
• XWare > APOD

... 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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... self-absorption - the absorption of light shining on an object by a process similar to that which produced the light originally; if a cloud emits less light than it absorbs from other clouds behind it, this net loss of light, termed self-absorption , causes the foreground cloud to appear darker than the background field (the term is from spectroscopy, where small absorption dips sometimes occur in larger emission lines, making the latter look as if it is absorbing part of itself) . ... HISA Main ...

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• The Pleiades

EMBARGOED UNTIL: 9:20 AM CST, January 6, 1999 CONTACT: John Biretta Space Telecsope Science Institute, Baltimore, MD (Phone: (410) 338-4917; Internet: biretta@stsci.edu) HUBBLE DETECTS FASTER-THAN-LIGHT MOTION IN GALAXY M87 Astronomers reported today discovering clouds which appear to move many times faster than the speed of light, shooting out from the region of a black hole at the center of the M87 galaxy. ... It's an illusion created by the finite speed of light and rapid motion," Biretta said. ...

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• WFPC2 Instrument Handbook Update
• Run Specview In Applet Mode
• Making HST Pictures: Illustrations

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. ... The Orion Nebula from VLT . ... But this image , a representative-color composite of 81 near- infrared light images taken with VLT's ISAAC , shows the Orion Nebula to be a busy neighborhood of young stars, hot gas, and dark dust. ... The eerie blue glow surrounding the bright stars pictured here is their own starlight reflected by nearby dust . ...

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• APOD: July 13, 1999 - The Flame Nebula in Infrared
• APOD: 2000 April 24 - Reflection Nebula M78
• APOD: May 1, 1996 - Comet Hyakutake and a Cactus

Astronotes Armagh Planetarium's Stellar Blog! ... Space Flight . ... Earth Satellites . ... Leonid meteors seen from 13 km altitude aboard an aircraft during the 1999 Leonids Multi-Instrument Aircraft Campaign (Leonid-MAC). Comet Tempel-Tuttle provides the cometary debris for the Leonid meteor shower. ... Every 17-19 November Earth crosses Tempel-TuttleтАЩs orbit and the Leonids become visible. With clear, dark skies observers may see 10 to 15 Leonid meteors every hour on those mornings. ...

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• June Night Sky | Astronotes

. The Cassini image reveals dark regions relatively free of high clouds where methane is strongly absorbed, and bright zones where high, thick clouds shield the methane below. Markedly different cloud attributes appear in different latitude bands. The image also shows a high-altitude atmospheric disturbance just south of the equator that has persisted since the 1990s. NASA / JPL / Space Science Institute

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• Why do some stars appear to flash a variety of different colors when you look
• Two very different gas clouds in the galaxy next door | Astronomy.com
• NASAт??s Hubble sees a horsehead of a different color | Astronomy.com

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... These noctilucent "night-shining" clouds (or NLCs) are believed to form by sunlight reflecting off ice crystals high in the atmosphere, and usually appear in the northwest to northeast. ... NLCs occur at very high altitudes, in excess of 50 miles high, in the region above the stratosphere known as the mesosphere and at first sight they look like cirrus clouds. ... Noctilucent Clouds, July 2006 . ... NLCs from Space . ...

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• May 2002 Planetary Alignment
• M.D. Smith, Research Astronomer
• Bright fireball seen over Ireland | International Year of Astronomy in Ireland

A team of U.S. and German astrophysicists have made the first ever detection of X-rays coming from a comet. ... Following the initial detection, the team reported repeated X-ray emissions from the comet over the next 24 hours. ... One preliminary theory is that X-ray emission from the Sun was absorbed by a cloud of gaseous water molecules surrounding the nucleus of the comet, and then were re-emitted by the molecules in a process physicists call "fluorescence." ... Comets . ...

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• The Sun
• Kuiper-Oort
• Comet Introduction

... Главная . ... Новости . ... Проекты . Любителям астрономии . Проект ISON . ... Подробнее . ... Категория: Новости проекта ISON . ... Метки: Космический мусор ,љ Астероиды ,љ Гамма-всплески ,љ Любителям астрономии ,љ Кометы љ . ... Метки: Космический мусор ,љ Астероиды ,љ Любителям астрономии љ . ... Новости обсерваторий проекта] - Обсерватория Кубанского государственного университета от Иванов А - 09.04.2016 11:08:49 . ... 1999-2013 Copyright "Астрономия и Телескопостроение" . ...

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... Archives . ... Estimating f under ?Sparse Poisson Intensity? condition is an frequently appearing topic in high energy astrophysics data analysis. ... tempt me to study and try their algorithm. ... Algorithms arXiv Astro Bad AstroStat Bayesian CHASC Cross-Cultural Data Processing Fitting Frequentist Galaxies gamma-ray High-Energy Imaging Jargon Job Languages MC MCMC Meta Methods Misc News Nuggets Objects Optical Physics Quotes Spectral Stars Stat Timing Uncertainty X-ray . ... Chandra Blog . ...

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• The AstroStat Slog light curve
• Chandra Supernova Remnants Catalog - Instrumental Artifacts
• The AstroStat Slog Blog Archive different views

... 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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• introduction
• Astronomical Image Retouching
• EoN_sky

... The ancient chronical said about the colour rings around the Sun and the Moon, about three suns in the sky, light columns, bright lightning, different "comets" rushing to the Earth, moving among the stars or round the Earth with the sky. All these occurrences may be divided into three categories: one that occur in the near or far space, processes going on in the Earth atmosphere under the influence of cosmic factors and at last the occurrences connected with the Earth atmosphere. ... Rainbow . ...

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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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• Low Surface Brightness Galaxy Gallery
• ESO Press Release 06/96, 16 February 1996
• Galaxy Gallery Page III

... To go back in time, archaeoastronomers and teachers can turn to personal computers and any of a number of software packages. ... Examples include the Long Man of Wilmington, England and the Owl Man of Peru (see figure 8 and figure 9 ). ... Deciphering the unique number system of the Maya is another archaeoastronomy topic that involves a minimum of math. ... Several collections of early writing of the Maya survive; numbers from them can be read and in some cases interpreted (see figure 12 ). ...

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• ASP: Beacons in the Gloom
• ASP: A Flag for Mars
• ASP: Accidental Astrophysics: The Devil's In the Magnitudes, Part II

... Observers looking at an object that is moving away from them see light that has a longer wavelength than it had when it was emitted (a redshift), while observers looking at an approaching source see light that is shifted to shorter wavelength (a blueshift). ... By measuring the amount of the shift to the red, we can determine that the bright galaxy is moving away at 3,000 km/sec, which is 1 percent of the speed of light, because its lines are shifted in wavelength by 1 percent to the red. ... Part 2...

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• Getting the observations
• XID: Cross-Association of ROSAT/Bright Source Catalog
• Some statistical trends and distributions

Check out the new images (Jan 18-25) and (Jan 26-Feb 05) of the comet by Rob McNaught. ... Every few years a comet becomes bright enough to be easily seen with the naked eye but only every decade or so are these comparable with comets like Halley. ... Before Jan 13, the comet is not visible in the Australian sky after sunset. ... SOHO images . ... On Jan 12 at approximately 09:00 UT (8pm NSW time), comet C/2006 P1 McNaught appears at the 11 o'clock position in the images. ... STEREO images . ...

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• Pink Black Holes: Frequently Asked Questions
• VV29 = Arp 188 = The Chainsaw Galaxy

Supernova 1987A in LMC . One day in 1987, an astronomer by the name of Ian Shelton was making observations of the Tarantula Nebula in Large Magellanic cloud at Las Campanas Observatory, and he noticed something strange on his image. ... SN 1987A got as bright as 2.7, the only other recent SN even to come close was 1885A in M31 which got up to mag 6. ... Mag 4.5 . ... IAUC 4318 2/25/87 Type II? ... IAUC 7354 2/1/00 New structure in the inner ring . ... IAUC 7360 2/7/00 HST observation of new spot . ...

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• Supernovae 2010jl in UGC 5189A
• Supernova 1999cl in M88
• Bright Supernova Bright Supernova

Seven months ago, on Mar 19, 2008, at 09:12 Moscow time, a new star appeared on the sky. The Sun had already risen over the Russia, but people of the Western hemisphere might be able to see by their eyes a faint starlet near one of Bootes constellation stars. This starlet appeared and faded by an order of magnitude in a minute. Astronomers named it GRB080319B or, informally, the Naked-Eye Burst, as it was twice as bright as human eye can see a star. ... Royal Astronomical Society . ...

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• Origin of the internal structures in HL Tauri jet (HH 151)
• New Luminous Variable Star in M33
• Evidences of supercritical accretion onto black hole in SS433