... But there also exists a practical angle: in a world increasingly dependent on electricity and electronics, the "space weather" outside the atmosphere can have serious effects, in particular on human communications. Currently more than 200 communication satellites circle the Earth in synchronous orbit . ... For a view of NOAA's "space weather report," click here ; another such report, from the University of Michigan, is linked here . ... Another such event occured April 7-11, 1997 . ...

Astronotes Armagh Planetarium's Stellar Blog! ... Universe . ... About four centuries ago, a tiny white dwarf star about the same diameter as Earth, but with a mass equivalent to the Sun, swung in a tight orbit about some larger star. The white dwarfтАЩs intense gravity tore material from its more massive companion. ... The quantity of mass in the universe is constant since the universe started its last self-replication, since its last singularity, its last pre-big bang re-birth conception. ...

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... Despite the use of counterweights, I have had ongoing problems with preventing unwanted motion in altitude, particularly during star parties when everyone seems to want to lean on the telescope while observing. ... After some difficulties at a windy star party a few years ago at the Boston Museum of Science, I designed a simple and very effective altitude brake and slow motion control which can be assembled very quickly and at minimal cost. ... The other end of the arm attaches to a turnbuckle*. ...

... Meantime catalogue represents data collected by MSU-E & MCU-SK devices from spacecrafts "Resurs" , "Okean-O" and "Meteor-3M". ... Select in particular fields on the main page of catalogue ' Search MSU-E ' or ' Search MSU-SK ' for immidiate search using selected criteria, then provide coordinate data, time as well as quality and percentage of clauds and submit your request. ... For browsing archived data refer to ' Data ordering ' item on the main page. ...

Prague, August 16, 2006 . To start a new GCVS edition (presumably an electronic one), combining the stars of the GCVS IV and Name Lists (and maybe eventually merged with automatic-survey variables), we need to revise the GCVS classification system. ... Our approach: the classification scheme must be simplified, more detailed classification should be given in specialized catalogs for particular types, but the GCVS classification should take into account new astrophysics. ...

XEphem Forum Message . Forums: . ... Post . ... Xephem Catalogs . ... Post Message | ... Posted by Thomas Schanz on December 14, 2000 17:35:25 UTC . ... Re: Xephem catalogs - dilapo - December 17, 2000 - 05:31 UTC . Re: Re: Xephem catalogs - springhill - December 20, 2000 - 06:38 UTC . Re: Re: Re: Xephem catalogs - stevev - December 20, 2000 - 20:40 UTC . Re: Re: Re: Xephem catalogs - ecdowney - December 21, 2000 - 18:37 UTC . ... www.astronomy.net . About Astronomy Net | ...

... According to the most popular cosmological paradigm, the greater part of the galaxy mass is accumulated in the dark matter halo. ... The polar ring galaxies (PRGs) reveal external rings or disks of gas, dust and stars rotating in a plane roughly perpendicular to the disk of the central galaxy. ... The shape of the dark halo in the model was chosen so as to achieve the best fit to the observed rotation of both galaxies themselves and their polar rings. ... The SPRC-7 galaxy. ...

This module provides for executing CGI scripts based on media type or request method. ... Source File: mod_actions.c . ... Action . ... Syntax: Action action-type cgi-script . ... Examples: # Requests for files of a particular type: Action image/gif /cgi-bin/images.cgi # Files of a particular file extension AddHandler my-file-type .xyz Action my-file-type /cgi-bin/program.cgi . ... This directive adds an action, which will activate cgi-script when a file is requested using the method of method . ...

Frob enius endomorphisms of linear spaces Alexander E. Guterman My research interests are in ring theory, linear algebra and combinatorics. In particular, I investigate transformations on matrices over different algebraic structures, preserving some matrix properties, sets or invariants. ... I was investigating monotone matrix transformations and developed method of matrix deformations and chain method in order to classify monotone linear and additive transformations on matrices. ...

Sharpening Our Focus . ... For more than a century the Astronomical Society of the Pacific has worked to spread the understanding of astronomy, in particular, and science, in general. ... It confirmed what many of us had suspected: there isn't one ASP, but many. ... And to many people we were primarily a catalog that sells astronomical products. ... Over the past several years, almost without really trying to do so, we have become a leader in the field of astronomy education and outreach. ...

SXG Data Center . ... Data archive . ... The prototype of archiving and data extracting system was realized for MOXE all-sky monitor long-term data archive . ... The data must be organized in the way that will provide the maximum effectiveness for the goals of long term data analysis i.e. long period monitoring of the particular field of the sky. ... DBM2 field Because the data in DBM2 are stored sorted by the fields on the sky it is the simpliest way to specify which part of the sky is necessary. ...

As in the last years, the Ephemerides of Minor Planets for 2015 are prepared by the IAA RAS only in the electronic form. ... Orbital elements of all numbered planets have been determined in IAA all over again on the ground of available observations in the catalog of the Minor Planet Center. ... More detailed information on orbital elements used in the present volume of EMP and their accuracy is given in section "Information on new orbital elements". ... a) information on new orbital elements; . ...

Por qu se explora la magnetosfera? Una raz n convincente es que eso ayuda a comprender los fen menos en el universo m s lejano, en particular la red intrincada de fen menos del plasma, campos magn ticos y aceleraci n de part culas. ... Desgraciadamente, tan lejos no es una forma segura de predecir si la direcci n del campo magn tico transportado por el plasma de una erupci n solar se inclinar hacia el norte o hacia el sur, factor importante en la predicci n del ?tiempo meteorol gico espacial?. ...

... Since Johnson Space Center opened in 1961, employees have been lucky to share the grounds with white-tailed deer. ... Joggers and runners on trails or streets should avoid areas where they observe the presence of NASA/Blair JSC2003E62562 Roundup 44/1 SPACE CENTER ROUNDUP Lyndon B. Johnson Space Center any deer, even does, because where there are does, bucks are probably near. ... However, the driving motivator that kept me in the service was the opportunity to fly fighter aircraft. ... Roundup 03 ...

... Принадлежности для телескопов MEADE . ... Окуляры и линзы Барлоу эконом-класса . ... Окуляр Meade 5000 Plossl 5.5mm (1.25") . ... Симметричные (Plossl) окуляры серии 5000 - прорыв в области оптического дизайна в сочетании с обычным качеством исполнения от Meade. ... Окуляр парфокален (то есть не требует перефокусировки при смене увеличения) не только с другими окулярами серии 5000, но и большинством других 1.25" окуляров от Meade и многих других производителей. ... Окуляры PENTAX . ... Pentax.ru . ...

... The following entity names are used in HTML, always prefixed by ampersand (&) and followed by a semicolon as shown. ... Name Syntax Description Aacute Aacute; Capital A, acute accent Agrave Agrave; Capital A, grave accent Acirc Acirc; Capital A, circumflex accent Atilde Atilde; Capital A, tilde Aring Aring; Capital A, ring Auml Auml; Capital A, dieresis or umlaut mark AElig AElig; Capital AE dipthong (ligature) Ccedil Ccedil; Capital C, cedilla Eacute Eacute; ...

... Structure of Data . ... Catalog . ... In SAI OCL Catalog, we introduce our work on investigation of the Milky Way system of open star clusters. The main goal of our study is a search for new clusters using huge surveys. 168 new clusters have been already discovered by us using J,H,Ks data from 2MASS point source catalog. ... For 141 new clusters, we found their physical parameters using J,H,Ks data from 2MASS catalog and, for a number of clusters, our UBVRI CCD observational magnitudes. ...

The IAO-type events have to stimulte the science-educating style of the Olympiads. To follow the main science-educating principles of the IAO-type events and Schools for Young Astrophysicists , particularly: . ... The minimum duration of the IAO-type event is defined as 5 days (4 nights). ... foreign language teams for an international IAO-type event - 1 / 2. ... The full text of the current Supplementary Instructions N 4 IAO-type events and Schools for Young Astrophysicists to be presented later. ...

... Bad Astronomy . ... Bitesize Astronomy . ... Keep Bad Astronomy close to your heart, and help make me filthy rich. Hey, it's either this or one of those really irritating PayPal donation buttons here. ... One in particular was named Charles Messier (he was French, so don't pronounce it ``mess ee er''! ... Between the years 1771 and 1784 the list grew to about 100 objects (many of which were found by others as well), and he gave his list to other comet hunters so they might not be fooled. ...