... Bad Astronomy . ... Bitesize Astronomy . ... Have you ever looked at pictures of Saturn's rings and noticed what look like gaps in the rings? ... Gian Domenico Cassini discovered a large gap in Saturn's rings in 1675. Later, an astronomer named Encke discovered a smaller gap near the edge of the rings. ... It was found long ago that an orbit in the Cassini Division, as the large gap is named, has a period almost exactly one-half that of one of Saturn's moons named Mimas. ... 2008 Phil Plait. ...

... Classes . ... casa . casa::ACG . ... ACG ( uInt seed=0, Int size=55) . ... The size parameter determines the size of two tables used in the generator. ... The table size affects the period of the generators; smaller values give shorter periods and larger tables give longer periods. ... The size parameter also determines the size of the table used for the Linear Congruential Generator. ... casa::ACG::ACG . ... The destructor cleans up memory allocated by this class. virtual uInt casa::ACG::asuInt . ...

... FIELD | ... METHOD . ... static int . ... Set this flag to have the ImageProcessor that is passed to the run() method converted to a FloatProcessor. static int . ... Set this flag if the filter wants its run() method to be called for all the slices in a stack. static int . ... Set this flag if the filter does not want its run method called. static int . ... Set this flag if the setup method of the filter should be called again after the calls to the run(ip) have finished. static int . ...

. Page Last Updated: October 1, 1999 . Questions and/or comments should be forwarded to: adminweb@stsci.edu

Next: Stars Up: File Formats Required Previous: File Formats Required . ... It is not so obvious that planning and reducing photometric observations also require information about the telescope used. ... This information is needed both for planning observations and reducing data. ... Many instrumental details influence the methods that must be used in reducing photometric observations, because the data-reduction process must accurately model the instrument's performance. ... Instrumental data . ...

... 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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... A Super Moon s Halo . ... A Full Perigee Moon rose as the Sun set last Sunday. At its closest to Earth it was, by just a bit, the year's brightest and largest Full Moon also known as a Super Moon. ... This panoramic night scene from June 8 looks out across a Moscow skyline from atop the main building of Lomonosov Moscow State University. ... M31: The Andromeda Galaxy . ... Andromeda is the nearest major galaxy to our own Milky Way Galaxy. Our Galaxy is thought to look much like Andromeda. ...

The types of respirators in use at APO are half-face, full face, and mask-style filter types. ... These respirators DO NOT supply oxygen. ... The observatory does not maintain Self Contained Breathing Apparatus (SCBA) for use and, consequently, materials that require them cannot be used. ... Whenever possible chose adequate ventilation over using a respirator. ... Oxygen monitors used for confined spaces may be used to monitor oxygen levels where respirators are required. ...

... The Radar Decoder correlates the received signal with the code used at transmission, generating the equivalent pulse-radar signal (digital). This process greatly reduces the output data rate over directly sampling with the Radar Interface , but requires that the ephemeris be very well known, so that the bins don't smear into one another. ... The Radar Interface samples an input input signal voltage (in quadrature), and provides it as a digital output to a VME bus for processing or recording. ...

... Apache HTTP Server Version 2.2 . Apache > HTTP Server > Documentation > Version 2.2 > Programs . ... htcacheclean is used to keep the size of mod_disk_cache 's storage within a certain limit. This tool can run either manually or in daemon mode. ... You can stop the daemon cleanly by sending it a TERM or INT signal. ... Options . ... This assumes that the Apache web server is not running (otherwise you may get garbage in the cache). ... Specify limit as the total disk cache size limit. ...

The AstroGuide . ... AstroGuide | ... AstroGuide Listing . ... See many more Astronomy Listings by: Category or Alphabet . Zeiss manufactures a wide array of precise optical, electronic, and mechanical devices and components. ... Listed Since July 15, 1998 . ... One Zeiss Drive . ... 914) 747-1800 . ... 914) 682-8296 . Web Site . http://www.zeiss.com/ . ... Web . www.astronomy.net . About Astronomy Net | ... dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

... 04/15/2005 Baikonur Cosmodrome. Photo-report The Soyuz TMA-6 manned transport spacecraft developed and manufactured at S.P. Korolev Rocket & Space Corporation Energia was launched from the launch complex of Site #1 known as the Gagarin start. ... Photo-report . ... At 5:00 a.m. Moscow Time, the transporter with the Soyuz-FG launch vehicle and the Soyuz TMA-6 transport spacecraft left the Assembly and Testing Facility and arrived to the launch pad for the final pre-launch processing. ...

... Imaging interferometry data presents us with two challenges: the aperture plane (i.e. the complex visibility function) is sparsely sampled, and the baseline phases are "totally corrupted" by the atmosphere while the closure phases, i.e. the sum of three closed loop baseline phases, is free of systematic errors. The two algorithms to take care of these challenges are deconvolution and phase self-calibration. The deconvolution algorithm we use is the CLEAN algorithm. ...

NEW Deadly.exe (DOOM.EXE v1.9 required) ================================================================ Title : Deadly Version : 1.92 Filename : Deadly.WAD and Deadly.deh (new DooM.exe once converted) Author : BGC Software Website Address : www.bgcsoft.force9.co.uk/ Deadly DooM address : www.bgcsoft.force9.co.uk/ddoom/ (Updates etc.. ... Play Information * Episode and Level # : Episode 1 Single Player : Yes Cooperative 2-4 Player : Yes, designed and tested alot of times. ... New Graphics : YES. ...

Next: Rotation Periods of ZAMS stars Previous: T Tauri Stars . ... The first attempts to directly measure periodic modulation of T Tauri stars occurred in the early 1980s. Rydgren & Vrba (1983) observed four PMS stars using photoelectric photometry over a period of seven consecutive photometric nights. ... Because the spot lifetime is much longer than the rotational period, the observed effect will be a modulation of the light from the star synchronously with the rotation period. ...

... 2013 June 29 . PanSTARRS: The Anti Tail Comet . ... But because planet Earth passed through the comet's orbital plane in late May, PanSTARRS will also be remembered for its remarkably long anti-tail . That edge-on perspective looking along the broad, fanned-out dust tail as it trailed behind the comet created the appearance of an anti-tail pointing in the sunward direction, back toward the inner solar system. ... About APOD | ... NASA Official: Phillip Newman Specific rights apply . ...

T he Siding Spring Survey (SSS) is a Near-Earth Object search program that utilises the 0.5-m Uppsala Schmidt Telescope at Siding Spring Observatory, N.S.W., Australia. ... The mission of the Siding Spring Survey is to contribute to the inventory of near-earth objects (NEOs), or more specifically, the potentially hazardous asteroids (PHAs) and comets (PHOs) that may pose a threat of impact and thus harm to civilization. ... Based on the CSS Mission page . ... Siding Spring Survey Main Page . ...

The nasa.gov site requires that JavaScripts be enabled in your browser. ... Contact NASA . ... The term "astronaut" derives from the Greek words meaning "space sailor," and refers to all who have been launched as crew members aboard NASA spacecraft bound for orbit and beyond. Since the inception of NASA's human space flight program, we have also maintained the term "astronaut" as the title for those selected to join the NASA corps of astronauts who make "space sailing" their career profession. ...

Winer Observatory P.O. Box 797, Sonoita, Arizona 85637-0797, USA . ... Winer Observatory) was incorporated in 1983 as a 501(c)(3) non-profit public charity to perform basic research in astronomy, provide educational outreach programs, and provide site and maintenance services for small telescopes through cooperative agreements with other astronomical institutions. ... The picture at the top left of this page is of our facility near Sonoita, Arizona, approximately 50 miles southeast of Tucson, Arizona. ...