... Stellar Evolution is driven entirely by the never ending battle between Pressure and Gravity . As imbalances are reached, the star is driven to find a new Energy source. ... Pressure and gravitational forces are equal, the star is stable and its core is sufficiently hot to fuse Hydrogen into Helium More about main sequence stars . ... The luminosity generated by the core fusion of Helium into Carbon is far greater than the shell luminosity associated with the fusion of Hydrogen into Helium. ...

... ABBREVIATIONS . ... ASTO (Archive Storage System) . ... COMMON . Common components . ... Common Pipeline Library . ... Data Base Browser . DFS . DFS (Data Flow System) . DHS . DHS (Data Handling Server) . ... DHS SUBRIBE . ... DFS Department general level . ... ISAAC pipeline . ... MIDAS (Munich Image Data Analysis System) . ... Next Generation Archive System . ... OLAS (On-Line Archive System) . ... SAF (Science Archive Facility) . ... VLT Control Software On-Line Archive Client . ...

... ATNF Home . About ATNF . ... About ATNF overview . ... Australia Telescope Steering Committee . ... Parkes radio telescope . ... Visiting Parkes radio telescope . ... Parkes radio telescope webcam . ... We discuss variations of the atmospheric extinction coefficients and transformation equations to the standard UBVRI system based on observations of standard stars during 1996-1997 at Siding Spring Observatory using a thinned SITe CCD and coloured glass filters. ... Standard System Transformations . ...

... Using UNIX System Calls and Library Functions . ... To use system calls and library functions in a C program we simply call the appropriate C function. Examples of standard library functions we have met include the higher level I/O functions -- fprintf() , malloc() .. ... For most system calls and library functions we have to include an appropriate header file. e.g. stdio.h, math.h . ... Information on nearly all system calls and library functions is available in manual pages. ...

... GLib defines a new type called a GString, which is similar to a standard C string but one that grows automatically. ... GString itself has a simple public definition: struct GString { gchar *str; /* Points to the string's current \0-terminated value. */ gint len; /* Current length */ }; . ... NULL may be given as the argument for an initially empty GString. void g_string_free( GString *string, gint free_segment ); . ... GString *g_string_assign( GString *lval, const gchar *rval ); . ...

We will describe the basic user operations for Tirgo Nicmos3 data handling as well as data format and telescope archiving items. ... Data handling during measurements . ... Worm cartridge formatting . All data taken with Tirgo Nicmos3 instruments (Arnica and Longsp) are stored directly as standard FITS files at 16 bits integer format. ... After having collected a between 50 to 100 data files, observer should use a 4Dos procedure ( savedata ) to move data files to a different location. ...

NGC 5986, a little-studied southern-hemisphere globular cluster, is remarkable in containing two very luminous A-F type stars, discovered by me in the 1970's. These objects are probably in their final evolution off the asymptotic giant branch. ... Determining the distance to NGC 5986 will help calibrate the absolute brightnesses of post-AGB A-F stars. ... NGC 5986: last updated 2001 December 20 . Mike Siegel and I have found a post-AGB star in the globular cluster M79 (NGC 1904). ...

... Archives . ... His foremost knowledge and historic account on statistical models related to errors may benefit astronomers. Although I didn?t study history of astronomy and statistics, I?m very much aware of how astronomy innovated statistical thinking, particularly the area of large sample theory. ... On the history and use of some standard statistical models . ... The particular reason for this paper into the slog is the following sentences: . ... Chandra Blog . ML Theory . ...

Общая Астрономическая Конференция > Товары для астрономов > Барахолка . продам монтировку для бинокля Parallelogram STANDARD II . ... Поиск . ... Кактус . ... Монтировка под прямые астрономические бинокли PARALLELOGRAM STANDARD II . ... монтировка для бинокля Parallelogram Standard 2 +orion 25x100 . ... продам монтировку параллелограмм для астрономического бинокля . ... Продам монтировку NexStar SLT GOTO - ПРОДАННО . ... Продам монтировку CG4(полный аналог EQ3) . ...

... Unexpected Galaxy String in the Early Universe . ... 20.01.2004 . ... NSF , NASA Explanation: How could such a long string of galaxies form so early in the universe? Several new measurements of galaxies and clusters in the early universe are reporting structures involving galaxies and clusters that are larger than expected with the new standard "dark-energy" cosmology . ... Publications with keywords: galaxies - early universe . Publications with words: galaxies - early universe . ...

... 2006 December 19 . Massive Stars in Open Cluster Pismis 24 . Credit: NASA , ESA and J. M. ApellАniz ( IAA , Spain). Explanation: How massive can a normal star be? Estimates made from distance, brightness and standard solar models had given one star in the open cluster Pismis 24 over 200 times the mass of our Sun, making it a record holder. ... Component stars would still remain near 100 solar masses, making them among the more massive stars currently on record. ... About APOD | ...

Working session on Standard Candles Chair: F. Haberl · Definition of standard candles Sources with constant X-ray flux: white dwarfs isolated neutron stars supernova remnants cluster of galaxies · Scientific drivers for accurate absolute fluxes neutron star radii cosmology (e.g. total mass of galaxy clusters, Sunyaev Zeldovic effect) · Calibration purposes absolute flux ...

... The New 1997 IEEE Standards Products Catalog features the complete listing of standards publica-tions and services IEEE Standards offers, along with the information you need to place your order. ... Books and Other Products on Standards - contains a detailed listing of informative print and electronic publications relevant to standards and their implementation in areas of electrical engineering, electronics and computer technology. ... IEEE Standards Products Listing 22 . ... Power Electronics 41 . ...

Optical and UV Spectrophotometric Standard Stars . ... A group headed by R. Bohlin at STScI have established a set of four white dwarf standards based on comparison of White Dwarf model atmospheres with HST FOS spectra. ... Extension of the white dwarf primary standards to more stars, giving 27 in total, are described in Bohlin (Proceedings of STScI HST Calibration Workshop, eds. A. Koratkar & C. Leitherer, p. 49, 1994) and in Bohlin (AJ, 111, 1743, 1996) . ...

OptInt PmWiki : Pm Wiki / Forms . ... Forms processing can be found in the Cookbook (see below). ... input text name value size= n :) (:input hidden name value :) (:input password name value :) (:input radio name value :) (:input checkbox name value :) (:input select name value label :) (:input default default-name default-value :) (:input submit name value :) (:input textarea name [=value=] rows= n cols= n :) (:input reset name label :) (:input file name label :) (:input image name "src" alt :) . ...

... We describe a tool in the PCIPS environment for finishing the job of globular cluster photometry started by DAOPHOT II: starting with the instrumental magnitudes derived by DAOPHOT II, DASHA can automatically produce final color-magnitude diagrams. ... DASHA can automate the whole process of globular cluster photometry, from instrumental magnitude lists produced by DAOPHOT II, to final color-magnitude diagrams. ... DASHA is oriented towards star lists produced by DAOPHOT II as source data. ...

... Серия: Standard . ... Вашему вниманию предлагается развивающая книга для детей с тестами "Увлекательное чтение". ... К книге прилагаются наклейки, которые малыш может наклеить в книгу на черно-белую картинку в перерыве между выполнениями заданий. Для детей 5-6 лет. ' title='Нож Ножемир H-101' border='0' align='left' width='120' style='margin-right: 20px;' hspace='7' vspace='5'/> . ...

... The material in "From Stargazers to Starships" meets several important requirements of the national standards. Pages cited below are from National Science Education Standards National Academy Press, Washington 1995. ... For example: the sections on astronomy not only describe calendars and sundials (including their construction), but also the astronomy of the ancient Greeks, including two different ways in which ancient Greeks estimated the distance to the Moon. ...

... Ultraluminous X-ray sources (ULXs) are located in external galaxies, their X-ray luminosities (10 39 - 10 41 erg/s) are thousand times greater than those of brightest black holes in the Galaxy. ULXs may be supercritical accretion disks around black holes of stellar masses (~10 Solar masses) like that in SS433, or they may be a hypothetical intermediate-mass black holes (hundreds - thousands Solar masses) with standard accretion disks. ... 2) The ULX progenitors were ejected from the star clusters. ...

. To redirect the standard input for a command use the < (less than) character followed by the name of the input file. For example: mail tony < memo . This redirects the standard input to the mail command so that it comes from the file memo . The effect of this is to mail the contents of this file to the user tony .