... A Hubble diagram for Quasars . ... The potential use of such relation as a cosmological probe is obvious: assuming no redshift evolution of the relation, the observed X-ray flux is a function of the observed UV flux, the redshift, and the parameters of the adopted cosmological model. ... In this framework, Guido Risaliti and Elisabeta Lusso (INAF-Arcetri Observatory) have recently published in the Astropysical Journal the first Hubble Diagram for quasars suitable for cosmological measurements . ...

... Here we concern the only one aspect of the talk: the description of coadjoint orbits associated with involutions. ... n)) and s( ) = s. A polarization of f n is a subalgebra that is also a maximal isotropic subspace with respect to the skew symmetric bilinear form f ([x, y ]). ... For any 1 t n we consider the involution t-1 that equals to a product of all reflections rm , 1 m s such that jm < t. Put 0 = id. ... Denote by p the linear subspace spanned by yij , (i, j ) P . ...

Astronotes Armagh Planetarium's Stellar Blog! ... Space Flight . ... Science Fiction . ... The New Horizons science team€а is inviting everyone worldwide to vote for the names that will be given to the most prominent features on Pluto and Charon, Pluto?s largest moon. The pre-listed names are€а an eclectic mix from mythology and the literature and history of exploration. You can even nominate names to be added to the list. ... Yuggoth (H. P. LovecraftтАЩs name for Pluto) . ... Name * . ...

Astronomical Society of the Pacific 2007 SPRING FUND DRIVE April 2007 Dear Friend of the ASP: Astronomy -- the spark that can lead to a lifelong interest in science. ... As the new president of the ASP, it is my honor to share with you how your gift is making a difference. ... Sincerely, James B. Kaler President P.S. I hope you will consider making an investment in our mission, to increase the joy and excitement of astronomy and space science while improving science education. ... Family ASTRO. ...

... Searching for Far Out and Wandering Worlds . ... The Real Reality Show: Would aliens be anything like us? ... The SETI Institute is after alien signals. Assuming another world is beaming a 1-million-watt radio signal in our direction, how far away can that source be before the signal is lost in intergalactic noise? ... Get instant access to subscriber content on Astronomy.com! ... If you are already registered on Astronomy.com, please log in below. ...

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2008 August 2 . Eclipse Shirt . ... Explanation: Of course , everyone is concerned about what to wear to a solar eclipse . ... The result, a grid of small holes in a kitchen strainer produced this pattern of images on an 'eclipse shirt'. ... About APOD | ... NASA Official: Phillip Newman Specific rights apply . ...

... Of course, the scope of chaos is vast, and we do not dare to cover it all. ... He will highly appreciate your help in compiling the list of URLs to such scientific groups and institutions. http://www.cplire.ru/win/InformChaosLab/ - InformChaos Lab (Moscow) . http://chaos.ssu.runnet.ru/ - Laboratory of Nonlinear Dynamics at Saratov State University (Saratov) . ... http://optics.npi.msu.su/sci/chaos.html - Chaos in laser systems . ... http://www.chaotic.com - Randle, Inc. ... Time: 2-6 July, 2001 . ...

In this world around us, there are two things that do not belong to any one country: air and ocean water. ... People are concerned about the air and the water used by everyone, and they are also concerned about the future of the Earth. ... Many ships sail in the ocean water - fishing ships, some ships carring people, some carring oil. ... Many birds and fish die because of the pollute water. Many fish are dying in the sea, others are getting contaminated. ...

... The first task assumes the searching for chemical composition and sizes of particles which give the wavelength dependence of the extinction efficiencies close to the observed dependence of . Figure 7: Wavelength dependence of the extinction efficiency factors for homogeneous spherical particles of different sizes consisting of astronomical silicate and amorphous carbon. The dashed segment shows the approximate wavelength dependence of the mean galactic extinction curve at optical wavelengths. ...

... ORGANIZATIONS: The Geological Society of America (Honorary Fellow); The American Geophysical Union (Fellow); The American Association for the Advancement of Science (Fellow); The American Institute of Aeronautics and Astronautics (Fellow); Sigma XI; American Association of Petroleum Geologists (Fellow); The American Institute of Mining, Metallurgical and Petroleum Engineers (Honorary Member); New Mexico Geological Society (Honorary Member); The American Astronautical Society. ...

The States participating in this Declaration, . ... Conscious of the question of whether and how Humankind should send a communication to extraterrestrial intelligence, . ... International consultations should be initiated to consider the question of sending communications to extraterrestrial civilizations. ... No communication to extraterrestrial intelligence should be sent by any State until appropriate international consultations have taken place. ...

... Find here a description of how to setup a new operational dfos installation. ... Therefore, we focus on the aspect of how to adapt the .dfosrc file and assume that anything else is then simply copied from the old ("reference") site to the new installation. ... dfos . ... click on 'download dfosExplorer' ; click on 'Save link target as' ; download dfosLog.tar into your $DFO_INSTALL_DIR; untar it (tar -xvf dfosExplorer.tar). click on 'description: dfosExplorer' and read the documentation . ...

Клуб Скептиков] [Конференция] . ... Seeking skeptical contacts from Russia . Dear russian skeptic ! ... read a little russian language but can not write . ... I am now especially interested in claims concerning scientific investigation of paranormal in Russia and . ... Alex Посмеемся.. ... Seeking skeptical contacts from Russia 25-Окт (11:16) Archy re: Seeking skeptical contacts from Russia 27-Окт (10:10) DoctoR re: Seeking skeptical contacts from Russia 27-Окт (16:21) Alex re: Посмеемся.. ...

This module provides an environment variable with a unique identifier for each request. ... The unique identifier is even unique across multiple machines in a properly configured cluster of machines. ... On Unix machines, Apache creates several children, the children process requests one at a time. ... To distinguish time we will use a Unix timestamp (seconds since January 1, 1970 UTC), and a 16-bit counter. ... The actual ordering of the encoding is: time stamp, IP address, pid, counter. ...

... 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 . ...

... This letter contains information about scientific contest - Olympiad, which is held yearly in Chernogolovka: a small pictures- que village not far from Moscow, in which the Noginsk Scientific Center (NSC) of the Russian Academy of sciences is situated. The contest is participated by pupils of the 8-th to the 11-th forms and consists in solving problems in physics, astronomy and mathema- tics. The Olympiad is one of interesting traditions of our scienti- fic centre. ...

... The Round Earth . ... Aristarchus around 270 BC derived the Moon's distance from the duration of a lunar eclipse (Hipparchus later found an independent method). ... Let R be the radius of that circle and T the time it takes the Moon to go around once, about one month. ... Viewed from Earth, a "new Moon" (occuring between the time a thin crescent is last seen before sunrise and the time one is seen shortly after sunset) happens when the Moon in its apparent motion around the sky overtakes the Sun. ...

... Bad Astronomy . ... Mad Science . ... Site Info . ... Public Talks . ... Keep Bad Astronomy close to your heart, and help make me filthy rich. ... Who is this guy who calls himself "The Bad Astronomer?" ... First, yes, I am a real live astronomer (when people ask me what astronomers do, I tell them "They astronom !" ... These are emitted by powerful objects like black holes, exploding stars, and super-dense neutrons stars. ... Finally, am I really a bad astronomer? ... 2008 Phil Plait. ...

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. ...

We are very interested to receive your opinion, proposals and criticism concerning services provided by WDC-B as well as the whole WDC System. ... E-mail address: . Select and mark a level of your knowledge of the WDC System and experience in usage its services: . I know nothing of WDC System and never used it . I know of WDC System but never used it . I know of WDC System and used it a few times . I use WDC System on regular basis . ...