... 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. ...

WFPC2 . Images: version1 , version2 . Catalogs: Version 1 HDF-S , HDF-N ;Version 2 HDF-S . STIS . ... NICMOS . Images: Camera 3 , V2 of psf-convolved STIS 50CCD on NICMOS . ... Images: WFPC2 FF , STIS FF ; Version2: WFPC2 FF , STIS FF , NICMOS FF . Catalogs: Version2 WFPC2 FF , STIS FF , NICMOS FF . ... Check the instrument specific technical pages for a description of the data products and the implemented data reduction steps: STIS , WFPC2 , NICMOS , Flanking Fields . ...

You can also see this page in Russian with using KOI8 (X Windows) or CP1251 (MS Windows) Cyrillic coding. The Laboratory supports the space TV experiments, mainly in the planetary exploration missions. ... Image Co-registration . ... PHOBOS mission - Martian satellites investigations. Phobos on the Martian limb, the image from Phobos-2 probe from 02/28/89. ... Russian Space Bulletin. ... Last modified at June,26 1997 Alexey Kuzmin: akuzmin@mx.iki.rssi.ru . Back to IKI home page ...

Examples of pipeline processing . ... This page presents examples of "on the fly" processing of FITS astronomical data available on the WEB using the HyperLeda pipeline tools. ... In many cases, raw data are archived and a consisten description of the file (FITS header) allows to process them on the fly. ... This first command makes a "pre-view" display of the image. o=fa:L93111HP1/00147&z=vg . ... The result of a pipeline processing is a FITS file that you can read as a normal disk file. ...

Proposer's Guide VLBI Space Observatory Programme Prepared by the VSOP Science Operations Group Institute of Space and Astronautical Science 10 August 1995 Proposals Due: Friday, 17 November 1995 Abstract This guide provides the technical information necessary to write a proposal for scientific observations with the VSOP space VLBI mission. ... 2 VSOP Spacecraft Antenna The main antenna of the VSOP spacecraft is of a Cassegrain design with a three­waveband coaxial feed at the focus. ...

In Actor Prolog a resident is a special mechanism that helps processes to inspect state of other processes. A resident observes the state of a specified (target) process and if the state of the process changes (for instance, after message handling) it proves a specified predicate of the process. ... Work of the resident. ... Any change of the list of target processes or arguments of resident function results in activation of the resident and repeated collection of information in the target worlds. ...

An Ancient Universe: How Astronomers Know the Vast Scale of Cosmic Time . THE PROCESS OF SCIENCE: HOW DO WE KNOW? The nature of the universe, its age, its birth and life story, have been deduced through the process of science. ... In the case of astronomy, it usually starts with making careful observations and measurements -- something your students can begin to do through inspection of astronomical images, and observation of the real sky. ... An Ancient Universe - Table of Contents . ...

Irregular phenomena in the Earth Pole oscillation process and temporal variations of geopotential Valery Bondarenko, Vadim Perepelkin s The observed irregular phenomena in the Earth Pole oscillation process are very variety. ... These phenomena indicated in the IERS data are the "abnormal" fluctuation of the Earth Pole coordinates which owing to changing of the geodynamical parameters gives negative result in interpolation and forecast of the first approximation mathematical model. ... Fig. ...

... Prepare an observing catalog for PALFA run: log in to fusion00 (as self, in group palfa) source ~palfa/python_env makeobs-new.py --MJDStart STARTMJD Read DOCS: mysql_python_scripts.txt for instructions. ... Click on "ALFA", "disable quick tsys", "choose receiver", and "dismiss" Click "Receiver IF/LO control", "New & Improved IF/LO setup" (blue), "Apply this setup", and "dismiss" "Pointing Control", default is psr.cat, click on the test pulsar (e.g. B0540+23, B1933+16), ` click on "point". ...

... Previous: Filtering KPNO LaTeX Observing Proposals with Perl . ... The Planning and Scheduling Tool was designed allow the user easily to take advantage of all available resources of the four telescopes (LASCO's three coronagraphs and the EIT Telescope) to maximize the use of the telemetry downlink. The Planning Tool allows users to develop customized observing sequences while monitoring compression factors and on-board processing times to realistically work within the limits of the instruments. ...

... 4.4 Imbedding HTML in a Document . In the following discussion of SPECIAL processing
, I will assume that rtftohtml has not been customized. If it has, the text styles used to create special effects may be different. ... Normally, if your RTF document contained the text "<cite>hello</cite>", the translator would output this as: "&lt;cite&gt;hello&lt;/cite&gt;". ... If, however, you want the <cite></cite> to be interpreted as HTML markup, you must format the tags using Hidden and Shadow. ...

A sequence of XMM-Newton observations during an orbit is the result of a long and complex process. ... The planning of an XMM-Newton revolution is articulated in three main steps: . the Advanced Plan . ... The definition of this Plan starts from the sample of targets, which are visible during the 15 revolutions covering one month. ... Once critical targets have been allocated to each revolution, the whole schedule must be filled, using the targets which are potentially visible in each observation. ...

... General information . ... Staff . Research staff . ... Information . ... Historical highlights . Historical research . ... This process is thought to occur in circumstellar disks of gas and dust around young stars on rather short timescales : infrared surveys show that the number of low mass stars with disks drops dramatically for stars older than 10 Myr, suggesting that in order to form large solids before the disk disperses, the growth process has to take place within a few million years. ...

... Why this is interesting: reasons for which astronomers get very excited around this time, and how your help can be valued for scientific research by Dr Apostolos Christou (Tolis), Armagh Observatory . Observing times . ... A variety of observing methods are suitable for the scientific study of mutual events. ... Time . The need for accurate time information is as important as the need for a reference object. ... International Year of Astronomy, Ireland National Node . ...

... You know what's easy? fork() is easy. ... That is, see if both the child and parent process use the same array.) ... If you know C or C++ and are pretty good using a Unix environment (or other POSIXey environment that supports these system calls) these documents are for you. ... As with Beej's Guide to Network Programming Using Internet Sockets , these documents are meant to springboard the aforementioned user into the realm of IPC by delivering a concise overview of various IPC techniques. ...

... Chandra , NASA Explanation: Is our Milky Way Galaxy surrounded by a halo of hot gas? ... Since NGC 4631 is similar to the Milky Way , this observation indicates that our own Galaxy is indeed surrounded by a halo of hot X-ray emitting gas, although we are too close to clearly differentiate them from more nearby extended X-ray sources. ... Publications with keywords: hot gas - spiral galaxy - NGC 4631 . Publications with words: hot gas - spiral galaxy - NGC 4631 . ... Nearby Spiral Galaxy NGC 4945 . ...

... Exposure Time Calculator (ETC) . Survey processing . ... VISTA is a 4-m class wide field survey telescope for the southern hemisphere, equipped with a near infrared camera (1.65 degree diameter field of view at VISTA's nominal pixel size) containing 67 million pixels of mean size 0.34 arcsec and available broad band filters at Z,Y,J,H,K s and a narrow band filter at 1.18 micron. A wide field visible camera, if constructed, could also be used on VISTA. ... Tile . ... ESO VISTA Public Surveys . ...

Telescope Jumps: One Cause is Found . ... One tries to take out the sag of the secondary cage as the telescope is pointed toward the zenith. The second component tries to take out changes in the secondary piston caused by temperature changes of the truss structure. ... Second, the jumps only occur when the temperature data causes motions of the piston which go in a direction opposite to the direction in which the sag component is driving the secondary. ... One has to wonder how this can occur. ...

Next: IDL Up: Data Processing Previous: Quick Look Tools . The Lynxx software has its own quick analysis tools. ... As previously discussed, the images can be rescaled, but if intensities are to be measured, the images should not be rescaled. ... Before starting any analysis on an image, the calibration frames must be removed from the image. ... Meas intensity is the command that will measure the intensity of the object in a square region around a star. ... It is advised to use the SBIG software. ...

The central star is actually a close binary. When one star evolved, expanded in size, and became a red giant, it literally swallowed its companion. The companion star then spiralled toward the red giant. In the process, it spewed out gas which formed a ring around the binary system. ... This two-stage process may have given rise to the butterfly-like shape of NGC 2346. ...