... 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. ...

... NICMOS Data Handbook > Chapter 4: Anomalies and Error Sources > 4.3 Bars . 4.3 Bars . ... They arise from electrical cross-talk in the detector lines when one camera reads out while the auto-flush pattern is executing in one or both parallel cameras. If an observation was made with all three cameras running in parallel using the same readout sequences, then there usually are no bars present in the data because there is no collision between camera readouts and parallel detector autoflush. ...

... Triton: Neptunes Largest Moon . ... So, looking toward the Sun, extreme ultraviolet cameras onboard STEREO B were able to record a stunning movie of a lunar transit (aka solar eclipse), as the Moon tracked across the solar disk. ... Stars, Dust and Nebula in NGC 2170 . ... Visible above are red glowing emission nebulas of hydrogen, blue reflection nebulas of dust, dark absorption nebulas of dust, and the stars that formed from them. ... APOD: 2007 February 24- X rays and the Eagle Nebula . ...

... If any additions or corrections are to be made, please drop a line : Pascal Mouret (pascal@bofix.univ-mrs.fr) @ SONG : The Lodger ( Hofstede ) He likes the cold winter nights And the dark afternoons The lodger When there are shadows behind Every window and blind The lodger There's another murder in the news today He kills only women always blondes they say They hear the sound of a car Keep the front door ajar The ...

... 2015 September 8 . Distorted Green Flash Sunset over Italy . ... For one thing, the typically round Sun appeared distorted, geometrically, and multiply layered . For another, some of these layers appeared unusually green. ... Different colors of the Sun may also become deflected by significantly different amounts, so that the uppermost superior image may appear momentarily green -- a phenomenon known as a green flash . ... Follow APOD on: Facebook , Google Plus , or Twitter . ... About APOD | ...

... Tonight's Sky . ... Observing . ... Sky this Month . ... Astronomy for Kids . ... Can you explain Mercury's retrograde motion? Do other planets appear to do this also? ... When astronomers talk about retrograde motion, generally they refer to the apparent motion outer planets make as Earth passes them while orbiting the Sun. ... Get instant access to subscriber content on Astronomy.com! ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ...

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 . ...

... The Sun has come all of one day away from breaking its record for the longest period of inactivity for the last decade - reaching a mid-summer low and falling into yet another state of "hibernation". Yesterday, on the first day of autumn, new sunspots appeared on the surface of the Sun following an absence of almost 50 days. ... The first low lasted 51 days, from 21 July until 11 September last year. ... Now, almost a year later, it seems the Sun has hit a new low almost as "deep" as the first. ...

... Date: 5 June 2010 01:19:14 GMT+01:00 . ... Solarfest, IAA/UAS sostice event, NLCs. ... 12:00 - Tea/Coffee . ... 15:30 - Solar Imaging Workshop - Dave Gradwell (IFAS) . ... 20:00 - Evening Public Lecture - "The Power of the Sun" - Dr. David Williams (UCL, MSSL) . ... ТљТљТљ At 8pm, our Evening Public Lecture will be presented by Dr. David Williams of the Mullard Space Science Laboratory, University College London http://www.mssl.ucl.ac.uk/~drw/ who is flying over just for the event. ...

... 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 . ...

... Blank lines and lines starting with "#" are skipped. #this line is optional INDENT=2 http://www.foo.com/ The top level entry http://www.bar.com/ One level down from the top http://www.baz.com/ Use a pipe symbol | to make some text appear outside of the link http://www.zap.com/ Use ampersand notation (e.g. |) to include a pipe symbol in the link text * Use an asterisk for the URL if you want text but no link http://www.cow.com/ Two levels down | ... Two levels down (parent is asterisk line) . ...

When people ask you for your last name ("apellido") for anything official, you need to be more careful than you realize, because they use a Spanish convention for surnames. ... The father's name is dominant, appears first, and is the one that appears in indices and such, and is used in everyday life. ... You only pass the paternal one to your children, so the child of John Smith Jones and Mary Lewis Nolan is Ann Smith Lewis. ... In Spanish, they're "Apellido Paterno" and "Appellido Materno". ...

... The larger image shows the entire nebula; the inset picture captures the complicated structure surrounding the dying star. The remarkable features of this nebula are the numerous holes in the inner shells with jets of material streaming from them. ... The multiple shells of material ejected by the dying star give this planetary nebula its odd form. ... At least four jets of material can be seen in the "full nebula" image: a pair near 6 and 12 o'clock and another near 2 and 8 o'clock. ...

Umbriel . Uranus II . Umbriel [UM-bree-ul] is the darkest satellite of Uranus. It is about the same size as Ariel and has about the same density. The surface appears to be old with large craters and does not change much from one location to another. Near the top is a puzzling bright ring called the fluorescent cheerio . ... Dark regions are represented as red and bright regions are represented as blue. The two white regions are bright ejecta from two fresh craters. ...

Next: Release of 18 Nov. ... Convert to 4 digit years in VLBA control files. ... Fix bug found by Norbert Bartel where a postpass warning goes out even on VLBA sites using 1 drive. 5dec97 RCW. ... Add some more variables to SAVE parameters that were missed before. ... 20 Jan 1998 RCW. ... 10 Feb 98. ... 17 Feb 98 RCW. ... Restructuring some of tape handling code to separate automatic tape handling from other types and to completely separate S2. ... RCW. ... Do not allow ``!'' in cover information. ...

Astronomy Discussion Forums . ... Atm ћ Astrophotography ћ Blackholes ћ Blackholes2 ћ CCD ћ Celestron ћ Domes ћ Education . ... New Model: How Do The Sun And Moon Appear To Move Across The Sky . ... Post Message | ... focused on the Sun and the Moon as they appear from the given location of the Earth surface: . ... www.astronomy.net . About Astronomy Net | ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

... The parameter y   characterizes the ratio between the gravitational and magnetic ``properties'' of a star and will, therefore, be called the gravimagnetic parameter . Two magnetic rotators having quite different magnetic fields, subjected to different external conditions but with identical gravimagnetic parameters, have similar magnetospheres, as long as the accretion rate is quite low ( ). ... For isolated rotators, the accretion rate  yr is assumed. ...

... The awsome spectacle of a brilliant comet, with its long ghostly tail streaming behind it, is a rare event. ... Only one other comet, Comet Halley, was seen so far from the Sun, giving scientists an opportunity to watch it as it slowly warmed up and sprouted a tail. ... Comets are the Rip Van Winkles of the solar system -- mini-worlds that have changed little during their 4.5-billion-year nap far from the Sun. ... Observing Comets . ... Once, comets inhabited the entire solar system. ...

ChangeLog for lccorr =============================== Open SPRs: ---------- 3111 Version 2.2.8 - 2004-03-17 (IMS/LUX) ------------------------- - Fixed SPR 3280. ... Version 2.2.6 - 2004-03-15 (IMS/LUX) ------------------------- - Fixed SPR 3272. ... Version 1.5 - 14 Sep 2001 (IMS/LUX) ------------------------- - Fixed another depend error. Version 1.4.5 - 17 May 2001 (IMS/LUX) ------------------------- - Fixed depend error. ... SPR deprecating use of caps in taskname macro fixed. ...

... Assuming access to a computer and some form of internet connection, the advice given in the network access page stands. ... Without access to the licence manager, the compiler will refuse to run. It is possible to compile code on linux.phy.pwf.cam.ac.uk and then run it on one's personal Linux machine whilst not dialed up. ... Compile the program on linux.phy.pwf using ` f95 -Bstatic ', e.g. f95 -Bstatic -o myprog myprog.f90 -lnag . ... Run the executable as usual ( ./myprog ) on your own machine. ...