... This handle is used to identify the file in subsequent calls to other DAF routines. ... Exceptions 1) If the specified file has already been opened, either by the DAF routines or by other code, an error is signaled by routines in the call tree of this routine. ... 4) If the specified file is not a DAF file, an error is signaled by routines in the call tree of this routine. ... 7) If an I/O error occurs in the process of opening the file, routines in the call tree of this routine signal an error. ...

... 2006 February 25 . SOFIA's Window Seat . ... Explanation: Earlier this month, a 2.5-meter diameter infrared telescope was permanently assigned a window seat , looking through this opening in the fuselage of a historic Boeing 747 aircraft. ... Known as the Stratospheric Observatory For Infrared Astronomy ( SOFIA ), the airborne observatory is intended to fly at altitudes up to 45,000 feet - above more than 99% of the atmospheric water vapor. ... About APOD | ... NASA Official: Jay Norris. ...

... ESO, the European Southern Observatory . ... VLT/Paranal . ... Survey Telescopes . ... The VLT Survey Telescope (VST) is the latest telescope to be added to ESOтАЩs Paranal Observatory in the Atacama Desert of northern Chile. ... It is the largest telescope in the world dedicated to sky surveys in visible light. The VST was designed and built by the INAFтАУOsservatorio Astronomico di Capodimonte, Naples, Italy as part of a joint venture between INAF and ESO. €а . ... VLT Survey Telescope . ...

Name: PGQID Purpose: inquire current device identifier Category: GRAPHICS File: pgplot.src Author: T.J. Pearson Use: see description below. Description: SUBROUTINE PGQID (ID) INTEGER ID This subroutine returns the identifier of the currently selected device, or 0 if no device is selected. The identifier is assigned when PGOPEN is called to open the device, and may be used as an argument to PGSLCT. Each open device has a different identifier. ...

... Archives . ... Discontinuation of weekly [arXiv] series . ... For a discipline that relies so heavily on images, it is rather surprising how little use astronomy makes of the vast body of work on image analysis carried out by mathematicians and computer scientists. ... images. ... Images may be Opened and Closed with different structure elements. ... Tags: close , dilate , EotW , Equation , Equation of the Week , erode , Morphological operator , open , set theory . Category: Imaging , Jargon | ...

... 2000 January 12 . NGC 6791: An Old, Large Open Cluster . ... Explanation: NGC 6791 is one of the oldest and largest open clusters of stars known. ... Open star cluster NGC 6791 , however, contains thousands of stars recently measured to be about 8 billion years old. ... This enigma makes NGC 6791, pictured above , one of the most studied open clusters and a possible example of how stars might evolve in the centers of galaxies. ... About APOD | ...

... Tonight's Sky . ... The Magazine . News . Observing . ... Gravitational wave search provides insights into galaxy evolution and mergers . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Globular cluster NGC 2808, elliptical galaxy NGC 2986, and the Sextans Dwarf . ... Open cluster NGC 2818, spiral galaxy NGC 2964, and spiral galaxy NGC 2976 . ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ...

OptInt PmWiki : Pm Wiki / Pm Wiki . ... PmWiki pages look and act like normal web pages, except they have an " Edit " link that makes it easy to modify existing pages and add new pages into the website, using basic editing rules. ... Access control : PmWiki password protection can be applied to an entire site, to groups of pages, or to individual pages. ... This page may have a more recent version on pmwiki.org : PmWiki:PmWiki , and a talk page: PmWiki:PmWiki-Talk . ...