Statistics of sunspot activity . The sunspot indices . ... NGDC's observations . The solar regions . ... Average annual indices . ... August . ... August, 2013 . Visual indices of solar activity by National Geophysical Data Center . ... Average . ...

... I t was long thought that Titan was the largest satellite in the solar system but recent observations have shown that Titan's atmosphere is so thick that its solid surface is slightly smaller than Ganymede's . ... R ecent observations with the Hubble Space Telescope show remarkable near infrared views of Titan's surface (right and top). ... T he observations by HST also indicate that Titan's rotation is in fact synchronous like most of Saturn's other moons. more images . ... Saturn .. ...

... Visualization of such data has now become a complex 4-D data-mining problem, combining space and time, and finding interesting events in these large datasets. ... NEMO (Teuben 1994) and Starlab are traditional programming environments with which N-body simulations can be setup, run, and analyzed. ... By adding complete orbital information for a select number of stars we have started fully interactive data mining of our 4-D spacetime histories of these star cluster simulations runs. ...

... Tonight's Sky . ... The Magazine . ... Observing . ... Magazine . ... Gravitational wave search provides insights into galaxy evolution and mergers . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Astronomy for Kids . ... Observing springtime deep-sky objects with a large telescope . ... large (8 inches or larger) . ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ... Astronomy Magazine . ...

1000 of these sources, however, remains a mystery; these are the so-called unassociated gamma-ray sources, with no known astrophysical counterpart at any other wavelength. While many LAT unassociated sources likely belong to known classes of objects (e.g. pulsars), a more exotic origin for some of these sources is also possible (e.g. dark matter annihilation). ... These results will aid further studies and follow-up observations of LAT unassociated sources. ...

... A dynamo is created in a magnetic field by an electric circuit, part of which is moving relative to the rest (additional conditions must also be met). ... Furthermore, the plasma between them conducts electricity very well along its magnetic field lines, which act as if they were wires connecting Io and the planet (drawing). ... The drawing is not to scale. ... The Hubble Space Telescope , using its Wide Field and Planetary Camera 2, has been photographing auroras of the planet Jupiter. ...

... SCIENCE AND BUSINESS . Such a trifle as a starry night sky of largest observatories turned out to be a small change coin in commercial bargains for exclusive communal services in Russia, and for a few elite flats in penthouses in Ukraine. SCIENCE AND BUREAUCRATISM . ... Till in Russian) . ... Clericalization of science and education (Till in Russian). ... Researcher of the Sternberg Astronomical Institute, The Moscow University. ... SAI home page . ... October, 2008) . ... November, 2007) . ...

... Archives . ... Statistically speaking, ?false sources? are generally in the domain of Type II Type I errors, defined by the probability of detecting a signal where there is none. ... More than 2.3% of the sources are flagged as spurious. ... Type II error is claiming no signal when there is signal (failing to reject the null hypothesis when the alternative is true). Type I error is rejecting the null hypothesis when the null is true, i.e. detecting signal under no signal. ... Chandra Blog . ...

Next: Evolutionary Scenarios of Binary Up: No Title Previous: Introduction . After the pioneer paper by Zeldovich (1964)[ 217 ] it was largely recognized that the most spectacular observational appearances of compact stars must occur when they are in a binary system. ... So here we limit ourselves by briefly sketching out different kinds of presently known binaries that contain compact stars. The list of different types of binary systems with compact stars is presented in Table 1 . ...

RELATIVE SUNSPOT NUMBERS Description of Data from SGD Explanation of Data Reports: Relative Sunspot Numbers -- The relative sunspot number is an index of the activity of the entire visible disk of the Sun. ... The provisional daily Zurich relative sunspot numbers, Rz, were based upon observations made at Zurich and its two branch stations in Arosa and Locarno and communicated by M. Waldmeier of the Swiss Federal Observatory. ... This indicates the uncertainty above and below the predicted number. ...

The telescope configured for measurements of exoplanet transit light curves is seen from the north side in this May 2010 photo. Lower portions of the dome have been insulated to reduce daytime heating by radiation from the warm metal dome. ... The interior of the dome is seen soon after the encoder upgrade in February 2007. ... Karen Collins, a research astronomer specializing in exoplanets, helped with the telescope installation in August 2006. ... kielkopf at louisville dot edu . ...

... Ciel Espace, le magazine qui vous guide toujours plus loin . ... les plus belles images de l'Univers d†йcrypt†йes pour vous . ... des pages consacr†йes †а la publication de vos photos Mais c'est aussi une vraie communaut†й avec laquelle partager votre passion et nourrir votre curiosit†й. Accueil Ils photographient le ciel au Very Large Telescope . ... Astronomes ou ing†йnieurs, ils profitent de travailler sous le meilleur ciel du monde pour s'adonner †а leur passion de la photographie. ...

MAIN PAGE . ... Nova Cygni August 1975! ... 1975/76: Comet West! ... Dr. Richard West (4th from left) & AAL members visiting SES Betzdorf on occasion of our club's 25th anniversary - October 1996 . Comet West Information . ... It was the brightest comet visible from Earth since Comet West in 1976. ... 1997: Comet Hale-Bopp! ... Thus Comet Hale-Bopp never got closer to Earth than Earth gets to the Sun. ... Comet Hale-Bopp JPL Page . ... 1999: Total solar eclipse over Luxembourg! ...

... SQL | ... Tutorial: determine H0 using SQL queries to LEDA . ... We select in the database all galaxies with known velocity and magnitude and similar to a given template for which we know the distance, the magnitude and the radial velocity. ... We simply have to choose a property which does not depend on the distance, as for example the rotation velocity ( log(vrot) ) and select the galaxies having log(vrot) in a very narrow range around the value for the template galaxy. ... leda@univ-lyon1.fr ...

... Samara region . SSAU History . ... An alignment meeting on data mining, storage and processing of very large data amounts on the basis of hardware and software complex Big Data took place in Samara State Aerospace University. ... The laboratory for processing of very large data amounts on the basis of the hardware and software complex was made in the University and the necessary equipment was purchased. ... Data processing requires powerful processors and advanced computer programs. ... Big Data. ...

... 200 jet radii . ... bipolar simulation . initial density contrast 1/10,000 (jet/IGM) . ... Density films: (970 frames) . gif, 100MB] [MPEG IM, 5MB] . Density films: (97 frames) . gif, 10MB] [jpg, 0.9MB] [h363+, 0.9MB] [ISO MPEG4, 0.9MB] [pre MPEG4 v3, 0.9MB] [pre MPEG4 v2, 0.8MB] [real, 0.9MB] [gif, 1MB] [MPEG1, 0.9MB] [MPEG IM, 0.5MB] . ... Virtual Jets 2003 (Dogliani, Italy) [slides] [proceedings] . ... This page is maintained by Martin Krause ...

Variations of total ozone content and lower ozone stratosphere temperature in Antarctic Region during winter-spring period A.V. Grytsai National Taras Shevchenko University of Kyiv Astronomy and Space Physics Department assen@univ.kiev.ua Data, used in the work work Total ozone: Total Ozone Mapping Spectrometer (TOMS) measurements during 1979 - 2005 and Ozone Monitoring Instrument (OMI) ones for 2006, for http://toms.gsfc.nasa.gov/ftpdata.html. ... A long-term TOC decrease is significant. ...

... Bad Astronomy . ... Bitesize Astronomy . ... Bad Astro Store . ... Slacker Astronomy . ... Keep Bad Astronomy close to your heart, and help make me filthy rich. ... Life Under the Moon . ... Seeing Jupiter's Moons . ... Time Zones and the Spherical Earth . A Companion to the Earth? ... December 19, 1999) . ... Big Moon, Little Moon . ... How Big is the Moon? ... 14, 2000) . ... 2008 Phil Plait. ... Subscribe to the Bad Astronomy Newsletter! Talk about Bad Astronomy on the BA Bulletin Board! ...

Crater Gassendi . ... I made this drawing was made on the 26th of november 2001. If you compare this one with the previous drawing of Gassendi (below) the differences are clear. ... This drawing was made on the 28th of september 2001. After nearly a full month without observations I had a one hour gap between the thicker clouds. ... This drawing was made on the 29th of august 2001. ... This drawing was made on the 27th of august 2001. ... This drawing was made on the 25th of august 2001. ...

Title: A Dark-Matter Spike at the Galactic Center? Authors: Piero Ullio , HongSheng Zhao , Marc Kamionkowski . ... Title: The Galaxy Environment of Quasars in the Clowes-Campusano Large Quasar Group at z~1.3 . ... Title: The Galaxy Environment of a Quasar at z=1.226: A Possible Cluster Merger . ... 16 matches for the search pattern galaxy environment . The URL for this page is: http://xxx.itep.ru/find/astro-ph/1/galaxy+environment/0/1/0/past,all/0/0 www-admin@xxx.lanl.gov ...