... 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. ...

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2013 October 14 . High Noon Analemma Over Azerbaijan . Image Credit Copyright: Tun Tezel ( TWAN ) . Explanation: Is the Sun always straight up at noontime? ... Pictured above is one such high noon analemma -- a series of pictures always taken at exactly noontime over the course of a year. ... About APOD | ...

Astronomy Picture of the Day . ... Credit Copyright: Tun Tezel ( TWAN ) Explanation: Is the Sun always straight up at noontime? ... Turning the problem around, however, as in finding where the Sun actually appears to be at high noon , is as easy as waiting for midday, pointing your camera up, and taking a picture. ... Pictured above is one such high noon analemma -- a series of pictures always taken at exactly noontime over the course of a year. ... Publications with keywords: analemma . ...

. 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.

... Дни открытых дверей к юбилею САО РАН (12-14 апреля 2016 г.) . Международная конференция "Dark Ages and White Nights (Spectroscopy of the CMB)" (20-24 июня 2016 г.) . ... Международная конференция MULTI-SPIN GALAXIES - 2016 (26-30 сентября 2016 г.) . Международная астрономическая конференция "Физика звезд: от коллапса до коллапса" (3-7 октября 2016 г.) Архив . ... Подробнее.. ... 10.02.16 . ... БТА в реальном времени . ... Цейсс-1000 в реальном времени . ... Последнее обновление: 22/03/2016 ...

... This precise description is called the standard model of electroweak physics. ... What brings about this important difference in the mass of these "field" particles? ... The Oregon group participates in the ATLAS experiment to investigate this question. ... Since Oregon joined ATLAS early in 2006, the group has devoted its effort to the process of selection of interesting events generated by the collisions of high energy particles within the ATLAS detector. ...

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . Noctilucent clouds as photographed by Mark Bailey from Lisdoart on 14th July 2006 at 11.30 pm. ... These so-called noctilucent (night glowing) clouds (NLCs), are formed by sunlight reflecting off ice crystals high in the atmosphere, and usually appear in the northwest, through north to northeast during twilight in the late spring and summer months at our latitude. ...

... А.М. Белобородов (Колумбийский университет, США) . ... Рабочий язык конференции - русский. ... Е.М.Чуразов, д.ф .- м.н . А.А. Вихлинин, проф. д.ф .- м.н . М.Р.Гильфанов, д.ф .- м.н . М.Н.Павлинский, д.ф .- м.н . М.Г.Ревнивцев, д.ф .- м.н . С.Ю.Сазонов. д.ф .- м.н . М.Н.Павлинский (председатель), к.ф .- м.н . А.В.Мещеряков (зам. председателя), Н.Л.Александрович, к.ф .- м.н . В.А.Арефьев, к.ф .- м.н . Р.А.Буренин, П.Болдин, Н.П.Васильева, к.ф .- м.н . А.А.Воеводкин, В.Воробьев, А.Е.Елкин, ...

... Tonight's Sky . ... SUN MOON MERCURY VENUS MARS, JUPITER SATURN . ... Observing . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Venus appears highest in the sky for 2012 . The nearest planet to Earth appears high and bright in the evening sky in March. ... On March 15, magnitude т??4.4 Venus appears less than 3ТА north of magnitude т??2.1 Jupiter in the western sky. ... Only registered members of Astronomy.com are allowed to comment on this article. ...

... At high count rates, the video processing unit (VPU) of the FOC undercounts photon events, resulting in a nonlinear count rate. ... The FOC remains linear to much higher count rates for point sources than for uniform sources. ... Here, a uniform source is defined to be one in which the flux varies by less than +/- 10% on scales of 10 pixels, and the nonlinearity threshold is defined to be the count rate at which the FOC exhibits nonlinearity at the 10% level. ... 512 zoom x 1024 . ... 256 x 256 . ...

The Sun's corona . ... For instance, short "plumes" rising from the polar regions of the Sun look very much like field lines coming out of the end of a bar magnet, and they therefore suggest that the Sun, in addition to the intense fields of sunspots, also has a global magnetic field like the Earth's. Arches above the . Sun's surface . ... It is brightest near sunspots, whose arched field lines apparently hamper the outflow of solar wind which carries away energy and helps cool the corona. ...

... A rough estimation is that in the United States there is one planetarium per 100,000 population, ranging in size from the Hayden Planetarium's 20-meter dome seating 430 people, to three-meter inflatable portable domes where children sit on the floor. ... Together dblo associates make a huge impact in the architecture, interior design and development arena in London. ... With the holidays around the corner what better way to spoil your family than with your very own private home cinema. ...

Weekly Bulletin on Solar and Geomagnetic Activity Highlights on 02 - 08.07.2012, Forecast on 09 - 16.07.2012, Carrington Rotation 2125 (21,62.06.2012) SUNSPOT ACTIVITY WAS ON THE HIGH LEVEL AT 02 JULY AND AFTER - ON THE AVERAGE JEVEL. ... After 30.06 to 1.07 it area increased in 2.5 times (new magnetic flux emergence), and at time interval July 3 - 8 in it 5 large and 26 midle solar flare were occurrence. ... Fast development assumes high flare activity, since July 9-10. ... FLARES to tm te c/p local. ...

... ATNF Home . About ATNF . ... About ATNF overview . ... Australia Telescope Steering Committee . ... Australia Telescope User Committee . ... Facilities . ATNF facilities . ... Australian Square Kilometre Array Pathfinder . Murchison Radio-astronomy Observatory . ... Parkes radio telescope . Australia Telescope Compact Array . Mopra radio telescope . ... ATCA . ... Visiting Parkes radio telescope . Visiting Australia Telescope Compact Array . ... Parkes radio telescope webcam . ...

... Following a micrometeoritic impact in Rev.#961 (March 2005), a new hot column appeared, whose effects leak across the whole column RAWX=318 . While a correction for this hot column is possible and implemented for MOS1 exposures taken in Imaging Mode, the offset value in MOS1 exposures taken in Timing Mode is too high for any meaningful correction to be possible. ... mos1.evt is the name of the MOS1 event list . ... RAWX in [320:329])" . ... Calculate the effective area due to the excised columns . ...

... The GALFA Continuum Transit Survey group ( GALFACTS ; PI: A. R. Taylor) has conducted several test observations and will begin an all-sky full-Stokes continuum survey later this year with the new P-ALFA spectrometer. ... Sample Perseus images of GALFA H I 21cm-line and full-Stokes continuum emission are shown below along with maps of molecular (CO) gas, thermal dust, and ionized gas optical emission for comparison. ... The GALFA H I emission appears to envelop the molecular cloud gas traced by CO. ...

LoОc Le Tiran loic.le-tiran@obspm.fr Spineto June 10th, 2015 Stirring Up the Gas: Star Formation and Powering High Pressures in galaxies 10 Billion Years Ago An epoch of intense activity More s tars created Time Hopkins & Beacom, 2006 Irregular morphologies (NI CMOS F160W) · Morphologies are increasingly irregular towards higher redshifts. ... What is causing all these random motions? ... Lehnert+2009,2013, Le Tiran+2011ab Maybe gas accretion produces these random motions? ... Beam smearing? ...

The approaches mentioned in the section title belong to one family which is called in Newton's book [ 56 ] the short waves or high energy approximation (HEA). It means the scattering by soft particles (or potentials) in the case of the wavelengths short in comparison with the particle size (or correspondingly the case of scattering of high energy particles by the potentials). ...

True Color Image Gallery: Galactic SNR | Magellanic Cloud SNR . ... Chandra Proposer's Guide pile up section ] During frame readout, the ACIS CCDs take 40 microsec to (parallel) transfer the charge by one pixel. As a result of this, each frame readout, each pixel is exposed for 40 microsec to a source (plus cosmic X-ray background) at each location along its column. ... Note also that the image does not just trail, it extends along the whole column. ... Chandra Supernova Remnant Catalog . ...