... 2004 February 24 . X-Rays Indicate Star Ripped Up by Black Hole . Illustration Credit: M. Weiss, CXC , NASA . Explanation: What could rip a star apart? A black hole . Giant black holes in just the right mass range would pull on the front of a closely passing star much more strongly than on the back. Such a strong tidal force would stretch out a star and likely cause some of the star's gasses to fall into the black hole. ... About APOD | ... NASA Official: Jay Norris. ...

... February 22, 1999 . NGC 1316: After Galaxies Collide . ... WFPC2 , HST , NASA . ... A preliminary inspection indicates that NGC 1316 is an enormous elliptical galaxy that started devouring a smaller spiral galaxy neighbor about 100 million years ago. ... Most elliptical galaxies have more and brighter globular clusters than evident in NGC 1316 . ... One hypothesis therefore holds that these globulars survive from an even earlier galaxy that was subsumed into NGC 1316. ... About APOD > . ...

WRONG CENTER FREQUENCY AND WRONG SIDEBAND IN ARECIBO FITS-HEADERS WRONG SIDEBAND IN ARECIBO WAPP PULSAR DATA HEADERS Data affected: all previous FITS-files up to 2007-Feb-15 all previous WAPP-files up to 2007-Feb-15 ======================================================== A bug affecting the reported center frequency and sideband selection has been found and corrected. ... It is also possible that the wrong sideband is indicated (FITS-header keywords UPPERSB and CDELT1). ...

These observations are aimed at fully charactering FORS1 photometric system (UBVRI zero-points, color-terms and extinction coefficients) for the Tektronix 2048x2048 pixel CCD (24µm px) . To this aim, the two Landolt/Stetson photometric fields SA95 and SA101 will be observed on a number of epochs and at different airmasses during February and March 2007. ... SA101 . ... OBs for SA101 have to be observed during evenigh twilight (exceptions are expected for the second half of March) . ...

... The Galway Astronomy Club are pleased to announce details of their upcoming Astronomy Festival to take place at the 4* Westwood House Hotel from Friday February 12th to Saturday February 13th 2010. The event will be styled in the same manner as this year (which worked very well) and will have ten different speakers. ... Dr Aaron Golden NUI Galway: тАЬHas Earth Contaminated the Solar System? тАУ the Case for Life on MarsтАЭ . ... International Year of Astronomy, Ireland National Node . ...

Blackholes Forum Message . Forums: . Atm ћ Astrophotography ћ Blackholes ћ Blackholes2 ћ CCD ћ Celestron ћ Domes ћ Education . ... Discussion Forums | Blackholes I | ... There Are Two Different Situations Here! Forum List | ... Back to Thread Topics | ... www.astronomy.net . About Astronomy Net | Advertise on Astronomy Net | ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

... Black Hole Signature From Advective Disks . ... If alone, a black hole would indeed appear quite black, but many black hole candidates are part of binary star systems. So how does a black hole binary system look different from a neutron star binary system? ... Sunspots: Magnetic Depressions . ... Our Sun has spots! These spots appear dark in photographs like the one above, but in fact sunspots are quite bright - they are just dark compared to the rest of the Sun. ... Blue Sun Glaring . ...

... Observing . ... Home Education Workshops at Adorama Astronomy Workshop: Observing Variable Stars from the City ? February 15, 2015 . ... Beyond New York City . ... Observing Resources for Amateur Astronomers - Part 1: Beginning Observers . ... A History of the First Forty Years of the Amateur Astronomers Association . ... Presented by€а Adorama €аFor the Amateur Astronomers Association of New York . ... 2016 Amateur Astronomers Association of New York Designed by Press Customizr Powered by . ...

.

... Circle area is proportional to the number of tweets + retweets tweets retweets . Order accounts: by user number (effectively random) by number of tweets (includes retweets) by number of followers by number of followers that also tweeted about AAS221 by number of friends that also tweeted about AAS221 . ... The top/left position is for the user with the largest number of followers, and the bottom/right is for the smallest number of followers. by number of followers that also tweeted about AAS221 . ...

... Fortranљ66 . ... Fixed form . ... Whole Fortranљ66 . ... Continuation line indicated in column 6 . ... Blank line as comment . ... Extension in Unix .f .f .f .f90 .f .f90 . Extension in DOS .FOR .FOR .FOR .F90 .FOR .F90 . ... This applies to both fixed form and free form source code. ... Fixed form of the source code is discouraged in Fortran 95! ... In UNIX there is no concept called extension, and the extensions are not specified in the Fortran standard, but in informal manufacturer standards. ...

... Moon . ... Monthly Sky Notes . ... By admin February 1, 2013 Posted in: Monthly Sky Notes . ... When sifting through the many stories surrounding the constellations ther