. This is a new popup window - close it when you are done . Submitted by Al Takeda on 12/06/2010 17:30:54 . Veil Nebula . Veil Nebula, Supernova remnant in Cygnus, Takahashi Epsilon-180, SBIG STL-6303E, RGB: 28:20:20 minutes, Total= 68 minutes, Chester, Vermont, 25 May 2009 . Logon to post a follow-up comment or review comments from others . Copyright (c) Amateur Telescope Makers of Boston, Inc. About Us Contact Us

Title: A New Model of the Gravitational Lens 0957+561 and a Limit on the Hubble Constant . Authors: Norman A. Grogin , Ramesh Narayan (Harvard Univ.) ... Title: ROSAT/PSPC observation of the distant cluster CL0939+472 . ... Title: Interaction in the Bimodal Galaxy Cluster A3528 . ... Title: Cosmological Implications of Galaxy Cluster Evolution . ... Title: Galaxy Cluster Virial Masses and Omega . ... Matches 201 to 222 from a total of 222 matches for the search pattern galaxy cluster . ...

... Apache HTTP Server Version 2.2 . Apache > HTTP Server > Documentation > Version 2.2 > Virtual Hosts . ... When using a large number of Virtual Hosts, Apache may run out of available file descriptors (sometimes called file handles ) if each Virtual Host specifies different log files. ... Unix operating systems limit the number of file descriptors that may be used by a process; the limit is typically 64, and may usually be increased up to a large hard-limit. ...

... 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. ...

... Earth During a Total Eclipse of the Sun . ... Credit Copyright: Expedition 12 Crew , NASA Explanation: What does the Earth look like during a total solar eclipse? It appears dark in the region where people see the eclipse, because that's where the shadow of the Moon falls. ... The featured image shows the Earth during the total solar eclipse of 2006 March , as seen from the International Space Station. ... Publications with keywords: total solar eclipse . ... Cheering a Total Solar Eclipse . ...

... On the morning of Thursday, 26 February, amid the Gal pagos Islands, the Sun will fade from view. Not the culmination of ancient prophecy, but none less mystical, Earth's small Moon will be executing a slow slide past the enormous Sun. ... And anyone living in southern North America, Central America, northern South America, or on islands and cruise ships in the Caribbean Sea will, weather permitting, have the opportunity to experience the wonder of a solar eclipse. ...

... Posts tagged ?law of total variance? ... To explain such decomposition and to make error analysis statistically rigorous, the law of total variance (LTV) seems indispensable. ... MADS] Law of Total Variance? Tags: additive , bias , law of total variance , MADS , mathematical statistics , mean integrated square error , mean square error , MISE , mse , probability theory , variance . ... Comment . ... Entries RSS . ... vlk on [MADS] Parallel Coordinates . ... Entries (RSS) and Comments (RSS) . ...

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2015 April 20 . Total Solar Eclipse over Svalbard . ... That was the feeling in Svalbard , Norway last month during a total eclipse of the Sun by the Moon. ... The next total eclipse of the Sun will occur in 2016 March and be visible from Southeast Asia. Follow APOD on: Facebook , Google Plus , or Twitter . ... About APOD | ...

... During the jump, the power level of the rfi goes down. (more info). p1693 took 327 pulsar search data during the main cable 8-4 repair. The data from 20feb14 (after midnite) showed (what appeared to be ) total power dropouts: . ... The first 2 gbyte file of each scan was processed (129 secs/file). There are 7 files starting at: . ... Page 2-4. total power vs time for files 100 -> 700. the dropouts became weaker, and then returned in file 500. ... dropouts were seen in the total power. ...

... Ciel Espace, le magazine qui vous guide toujours plus loin . ... les plus belles images de l'Univers d†йcrypt†йes pour vous . ... des pages consacr†йes †а la publication de vos photos Mais c'est aussi une vraie communaut†й avec laquelle partager votre passion et nourrir votre curiosit†й. Accueil Vid†йo: comment Huygens a rebondi sur Titan . ... Pour en savoir davantage sur ce satellite de la plan†иte Saturne, †йcoutez le podcast " Sous les brumes de Titan " sur le site Ciel et Espace Radio . ...

... The Second International Astronomy Olympiad . ... Problems to solve, 8-10 Form Text of these problems is available in Russian too. ... Two stars have the same absolute magnitude. ... The orbital period of Mars is 687 days. ... See problem 2. for 8-10 Form. ... Problem to solve, 9-12 Form Text of the problem is available in Russian too. ... Problem is about Doppler-effect, to find velosities of two stars using their spectra and spectrum of our Sun, to estimate speed of the Earth moving around the Sun...

... The combined event list takes from the intermediate event lists all of the events (combined into a single table), the collections of CCD-specific exposure tables and Good Time Interval (GTI) tables, and the collections of node-specific bad pixel tables and rejectable pixel tables. Name collisions among tables copied in from the intermediate event lists are avoided by placing the corresponding CCD number at the eighth character of the extension name. ... table : EVENTS -- evlistcomb . ... int32 . ...

Visit: . ... For most observations, plan windows are 8 weeks in duration, but they can be shorter or longer depending on the visit's constraints. ... See also the long range plan status below.) ... Contact your Program Coordinator for more information. ... This visit is not yet ready for long range planning. ... Although most visits are placed on the long range plan, some visits have special scheduling considerations which require them to be tracked in a different manner (e.g. snapshot programs). ...

... Thus the FTE described below must be added to the AOF FTE budget. ... Activity Scientist overview of changes (R7M) Observing preparation tool ( section 15.1) Instrument Control Panel ( section 15.2) Modification of AOF / Hawk-I acquisition template ( section 15.3) Site quality monitoring and display ( section 15.5) Exposure Time Calculator ( section 15.6) Modification Observing Tool (OT3) ( section 15.8) TOTAL FTE effort 1 0.1 0.3 0.3 0.3 0.2 0.3 2.5 ...

... Exposure Time Calculator (ETC) . Survey processing . ... VISTA is a 4-m class wide field survey telescope for the southern hemisphere, equipped with a near infrared camera (1.65 degree diameter field of view at VISTA's nominal pixel size) containing 67 million pixels of mean size 0.34 arcsec and available broad band filters at Z,Y,J,H,K s and a narrow band filter at 1.18 micron. A wide field visible camera, if constructed, could also be used on VISTA. ... Tile . ... ESO VISTA Public Surveys . ...

... Bojan Nikolic web pages home . ... I've posted a short note on using 183 GHz Radiometers to correct for . the atmospheric emission fluctuations that can limit total power . observations. The note is available at: . ... Please enable JavaScript to view the comments powered by Disqus. blog comments powered by Disqus . Copyright 2012, Bojan Nikolic feedback welcome ...

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 . ...

This page gives the name and meaning of the various parameters which can be queried in HyperLeda through SQL requests . ... real . ... actual error on t . ... log 10 of apparent major axis diameter d25 at 25 mag.arcsec -2 (d25 in 0.1') . ... actual error on logd25 . ... Apparent maximum rotation velocity of gas . ... log 10 of apparent corrected diameter (dc in 0.1') . ... total apparent corrected B-magnitude . ... total apparent corrected U-B color . ... Questions: leda@univ-lyon1.fr ...

... So my first bit of babble is presenting.. ... Yes comments such as . ... Consider yourself hit by a snowball. ************************************************************************** send this message to as many people as possible, in the first *INTERNATIONAL E-MAIL SNOWBALL FIGHT!* send it back or to people already listed above. send it to your parents, siblings, politicians, teachers, bullies or anyone else you've wanted to hit with a snowball. have fun. but ... Launch one today! ...

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. ...