... 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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... 2005 June 6 . Saturn: Dirty Rings and a Clean Moon . Credit: Cassini Imaging Team , SSI , JPL , ESA , NASA . Explanation: Eating surface ice from Enceladus might be healthier than eating ice from Saturn's rings -- it certainly appears cleaner. From their apparent densities and reflectance properties, both the rings of Saturn and its shiniest moon, Enceladus , are thought to be composed predominantly of water ice . ... About APOD | ... NASA Official: Jay Norris. ...

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• Sternberg Astronomical Institute
• APOD: November 25, 1995 - Saturn's Cleanest Moon: Enceladus
• APOD: 2012 April 11 - Geostationary Satellites Beyond the Alps

... Treatment of Pixel Artifacts Several tools in Photoshop are particularly useful for fixing undesirable pixels in a digital or scanned image : Clone Stamp tool (also available in The GIMP and older versions of Photoshop ) · copies pixels from a preselected sample region · allows for varying brush size, hardness and opacity Healing Brush tool (Introduced in Photoshop 7.0) · copies pixels from a preselected sample ... These layers may be copied to other images for similar results. ...

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• Terrestrial Silicates Compared to Astronomical Silicates
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... This section describes three functions which have been created to cleanup defects in images. The first two functions for cleaning rows and columns are particularly useful for CCD--images. ... These can often be removed with the commands: MODIFY/COLUMN INPUT OUTPUT [C or V] [columns] . ... This is particularly useful for removing the permanent defects which may exist in the CCD--frames and which cannot be removed by the MODIFY/COLUMN or MODIFY/ROW commands. ...

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• Averaging and Merging Frames

... Donate to Support Science Literacy . ... 2016 Annual Awards . The ASP is accepting nominations for the organizationтАЩs national annual awards which recognize special achievements in astronomy research, technology, education, and public outreach. ... Shop the AstroShop . ... The Astronomical Society of the Pacific (ASP) is accepting nominations for the organizationтАЩs national annual awards which recognize special achievements in astronomy research, technology, education, and public outreach.. ...

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... 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 . ...

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... SiD workshop, Fermilab, April 9-11 2007 April 9, 2007 Nick Sinev, SiD design Workshop, Fermilab 1 Topics 1. ... What and how was simulated What and was One column clusters effects Accepted background density Hit reconstruction efficiency Hit efficiency How to improve efficiency Conclusions April 9, 2007 Nick Sinev, SiD design Workshop, Fermilab 2 What is this April 9, 2007 Nick Sinev, SiD design Workshop, Fermilab 3 Marty's idea Shift charge in neighboring columns in opposite directions. ...

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Southern Ocean Sky . ... Credit Copyright: Alex Cherney (Terrastro); Music: Redmann Explanation: Clouds and sky both show illuminating changes during this time lapse video from the south of Australia. In the foreground are scenes visible over a rocky coastline toward the Southern Ocean . ... In the first sequence, looking toward the southwest, a nearly vertical band of zodiacal light is seen at sunset just before the band of the Milky Way Galaxy appears to settle into the sea. ...

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... 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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... Tonight's Sky . ... Sky this Month . ... Star Atlas . ... stars . ... The Sky This Week: April 1 - 10 . ... Observing springtime deep-sky objects with a large telescope . ... Why do some stars appear to flash a variety of different colors when you look at them through a telescope? ... So, Earthт??s atmosphere will bend some colors from especially bright stars more so than others, which makes the source look like itт??s flashing colors. Get instant access to subscriber content on Astronomy.com! ...

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... Previous: ESO C Library for an Image Processing Software Environment (eclipse) . ... A new CLEAN-type algorithm searches for model components not in the dirty image but in the multi-resolution wavelet transform of the dirty image based on the dirty beam. ... The improvement of this prototype Wavelet CLEAN, which does convolve with the dirty beam, can be attributed to a suppression of noise and aliasing in the dirty image by use of information in the sidelobes of the whole image domain. ...

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. 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.

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... Like the night sky on the Earth, the martian sky hosts a plethora of astronomical phenomena occurring around the clock in a neverending space opera played out for the benefit of robotic and future human observers alike. ... Moons . Mars has two moons, Phobos and Deimos . ... Under the same conditions, Deimos would be as bright as -5, somewhat brighter than the planet Venus appears in Earth's sky. ... The moons are also eclipsed by Mars itself (a situation analogous to lunar eclipses at the Earth). ...

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... Mike Carr and John Brinkmann breathe a sigh of relief as the camera makes it's way towards the clean room. Maki Sakaguchi/JPG, Craig Loomis/APO, Allyn Smith/UNMi, and Dave Summers/NMSU, along with Mike and Jon B., gather round for a last opportunity to see the camera before beginning it's hybernation in the clean room. These are the last of these minute-by-minute images. 35mm pictures have been extensively taken of all these activities. ...

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• traininglist.html

... 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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• National Astronomy and Ionosphere Center (Arecibo Observatory)
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... Generally, astronomical data archives are open to public. ... The data format?so called FITS. Yet, ASCII format catalogues are available (for example, VizieR , http://vizier.u-strasbg.fr/viz-bin/VizieR) . ... Here, I attach an email from 2006 Astrostatics Summer School at PSU , who kindly answer to my question on how to read files in FITS format. ?????????????from Patrick . ... The tool you want in this package is called dmlist , with a syntax like this to dump the data to an ASCII file: . ...

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... В четверг, 14 апреля 2016 г., состоится семинар кафедры астрофизики. Повестка дня . ... Начало в 11 час.15 мин. Ауд. ... В четверг, 31 марта 2016 г., состоится семинар кафедры астрофизики . ... В четверг, 24 марта 2016 г. , состоится семинар кафедры. ... В четверг, 17 марта 2016 г. , состоится заседание кафедры. ... ОСП НИИ ПММ Национального исследовательского Томского государственного университета) . ... Copyright 2016 Астрономия в Санкт-Петербургском университете . ...

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Astronotes Armagh Planetarium's Stellar Blog! ... Earth Satellites . ... According to Velikovsky, about 4000 years ago a giant volcano on Jupiter erupted and spewed a vast glob of debris into space, leaving the Great Red Spot behind as a permanent scar. The red hot lump ejected from Jupiter (referred to as a comet by Velikovsky) wandered into the inner Solar System, repeatedly crossing the Earth?s orbit and in fact often passing close to our helpless planet in the following millennia. ...

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RTT150 . ... This search system is designed for generating the necessary information on series of pointings (observations of each source consist of sets of exposures with different filters and sometimes with different exposure times) for observed sources. Search results appear at the separate page as a table with the following data: . DATE - real (not evening!) observations date (in YYYY-MM-DD format); . ... Bin - minimal CCD binning mode (may vary during the observations); . ...

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• General astronomical tools

... Meta Index / Home Page This section documents warnings and errors generated by this task (if any). ... error . ... The time series has no data subspace. ... The task calculated that no events from the background data set passed the selection expression. corrective action: The background time series in the output will be zero-valued. deprecatedUnit . ... There is neither a POISSERR keyword nor an ERROR column in the time series. corrective action: Poissonian errors assumed. illegalTwoAxisDssFilter . ...

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• Column
• Description