The database contains references to the papers, data files and links to the Internet resources related to measurements and calculations of the optical constants in the wavelength interval from X-rays to radio domain. ... References to some useful books and reviews on the subject (e.g. the classical handbooks edited by E.D.Palik) and links to Internet collections of optical constants and personal WWW pages with related software were also placed in the database. You have arrived at our welcome page. ...

Comets necessarily obey the same physical laws as every other object. ... If one considers only two bodies -- either the Sun and a planet, or the Sun and a comet -- the smaller body appears to follow an elliptical path or orbit about the Sun, which is at one focus of the ellipse. ... Another quantity that is conserved is called angular momentum. ... Comets simply are bodies which in general have more angular momentum per unit mass than do planets and therefore move in more elongated orbits. ...

... Since founding of the Olympiad] The Olympiad participants are not supposed to study at any institutions of higher education (university or school which can be considered technical colleges). ... Note: Exception may be done for the second time participating in IAOs students not older than 14.00 years on January 1st of the year of the Olympiad (i.e. born after January 01, 1999). ... Team of region, city, town: . ... of the XVIII International Astronomy Olympiad (2013), . ...

... Team . ... conferences . Holding conferences: . GRB mini-workshop 2006 . ... Here we present the V and Rc images of the GRB 021004 optical transient field. ... Below is the text of our telegram in GCN circular TITLE: GCN GRB OBSERVATION REPORT NUMBER: 1717 SUBJECT: GRB021004, late time optical observations DATE: 02/12/02 16:51:59 GMT FROM: Vladimir Sokolov at SAO RAS 23.9 ------------------------------------------ At this stage it is not clearly whether the object is the pure host galaxy. ...

Procedure to be followed by DMD secretary for DFS Group documentation . Initial email comes from author requesting document number. ... An email is then sent by the DMD secretary to the Technical Archive (tecarch@eso.org) with the same information, to request the last 4 digits of the document number (the 'chronological number'). ... Some time will pass and then the author, using the DFS Group tool 'WebCheck', will post a web readable version of the document on the DFS Group website. ...

Bigbang Forum Message . Forums: . ... Discussion Forums | ... All True IF Speed Of Light Is Constant (I Can Question That.. Forum List | ... Post Message | ... basicaly it says that speed of light is not constant because it depends of the movement of the source. ... www.astronomy.net . About Astronomy Net | Advertise on Astronomy Net | ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

Weekly Bulletin on Solar and Geomagnetic Activity Highlights on 22 - 28.06.2015, Forecast on 29.06 - 05.07.2015, Carrington Rotations 2165 (17,64.06.2015) SUNSPOT-FORMING ACTIVITY OF THE SUN WAS ON AVERAGE, AND 26 -27.06 LOW LEVELS. ... As a result of emergence of significant new magnetic fluxes in the following spot 22 and 25.06 there were two large solar flares. AVERAGE LOW LEVELS OF THE SUNSPOT-FORMING ACTIVITY ARE EXPECTED ON THE NEXT WEEK. ... G - geoeffectivity in last solar rotation. ...

... The orbits as follows are considered: INTERBALL Tail Probe (IB_TAIL) & Auroral Probe (IB_AUR), GEOTAIL (NASA/ISAS), and POLAR (NASA). ... The situation investigation aim is to select the following favourable spatial positions (FSP) : . ... FSP3 : That part of the FSP1 & FSP2 time intervals, which corresponds to the magnetic conjugations of the any couple of the considered spacecraft. ... The polar diagram plot . ... The geocentric distance (GCD) of the 4 spacecraft as a function of the time. ...

For solar wind dials without any explanatory text, see this page . ... There are three logs, one for each condition index ( K P , Solar Wind ,and NOAA/SEC .) ... More about the solar wind's recent behavior can be found on my Current Solar Wind Conditions page. ... Other items of interest include NOAA/SEC Current Conditions , my composite current Auroral Images page, Windows on the Universe: Space Weather , and Public Outreach Index, Department of Space Physics and Astronomy, Rice University . ...

DETERMINATION OF THE HUBBLE CONSTANT FROM THE GRAVITATIONAL STABILITY CRITERION OF THE GASEOUS DISKS, by A.V.Zasov, D.V.Bizyaev. ... Following proposition has been put forward: a total surface density of gas at radius $R_H$, where the mean densities of atomic ($\sigma_{HI}$) and molecular ($\sigma_{H_2}$) hydrogen are equal, corresponds (or proportional to) the critical gas density $\sigma_c$ for gravitational stability of gaseous disk. ...

README for XFree86 on OS/2 : Checking Compatibility of Video Hardware . ... Edit your CONFIG.SYS file to contain the following line somewhere: DEVICE=Y:\XFree86\lib\xf86sup.sys Of course replace ``Y:'' with the correct drive letter. ... Refer to section Adding Variables to CONFIG.SYS below. ... Start a full screen OS/2 CMD session and enter the following command: [C:\] Y:\XFree86\bin\SuperProbe . ... SuperProbe can identify many more video cards than are supported by XFree86. ...

home publications > mercury . SEARCH ASP SITE: Match ALL words Match ANY word . ... ASP Conference Series . ... Following the Martian Coastline . ... It seems scientists and laypeople alike have wondered for quite a long time whether or not water exists on Mars. ... A second reason we should determine the sites of ancient Martian seas is that if water once existed on Mars, it is possible that conditions for life obtained on the planet in the past and possibly even persist into the present. ...

... 24-Sep-14 JOURNиES 2014 Investigation · checking possibility of nutation rates estimation based on RLG observations simulation level · combination of simulated RLG data with real VLBI data · comparison of estimates based on real RLG data (Wettzell) with results of simulation 24-Sep-14 JOURNиES 2014 Simulation ... 10-8) 24-Sep-14 JOURNиES 2014 Simulated data + VLBI (ac. lev. ...

... Local Group velocity in km/s: where l is the Galactic longitude and b the Galactic latitude, and v sys is the systemic velocity in km/s. Distance in Mpc : We adopt the following distances for galaxies with small Local Group velocities (v LG NGC6822 0.490 Mpc ( Mateo 1998 ) DDO210 0.880 Mpc ( Mateo 1998 ) NGC0055 1.480 Mpc ( Mateo 1998 ) NGC0300 2.04 Mpc (Willick Batra 2001) ESO594-G004 1.060 Mpc ( Mateo ... absolute blue magnitude: with D in Mpc. ...

... Archives . ... If you do not mind the time predictor, it is hard to believe that this is a light curve, time dependent data. ... It?s hard to say this data set is designed for time series analysis apart from the complication in statistical inference due to measurement errors. How to design the statistical study with measurement errors, huge gaps in time, and unequal time intervals is complex and unexplored. ... The following is R output without measurement errors. ... Chandra Blog . ...

Astronotes Armagh Planetarium's Stellar Blog! ... Stars . ... Space Flight . ... Some 13.7 billion years ago, a mere millionth of a second after the Big Bang, the first hydrogen and helium nuclei condensed out of a hot, dense soup of quarks and gluons. ... In the very last few kilometres some of the light was scattered by a myriad of water droplets (containing hydrogen nuclei which had existed almost since the Big Bang) slowly descending through the air following a rainshower. ...

In this chapter we will consider an example of visual expert system written on the Actor Prolog language. ... There are a lot of methods of oil field bed stimulation that increase output of the oil production: thermal, physical-chemical, gas, microbiological, and others. ... Fig. ... The Top-Most diagram consists of three blocks: the "Describe parameters of hydrocarbon field" block, the "Check adaptability of existed methods of oil production" block, and the "Display solution" block. ... Gas methods. ...

... From a Bang to a Whimper - Celebrating Differing Views of the Universe - Tuesday 12 May 2009, Trinity College Dublin . ... Constructing a 16 inch Dobsonian Telescope: Monday 11 May 2009, Ballyclare . тАШ Discover the Stars at ArmaghтАЩ - the second Cross-Border Schools Science Conference, an International Year of Astronomy 2009 event, took place in Armagh on Wednesday 29th and Thursday 30th April 2009. ... International Year of Astronomy, Ireland National Node . ...

Astronomy Picture of the Day . ... Credit: Louis Strous ( LMSAL ), SOHO - MDI Consortium, ESA , NASA Explanation: The Sun rotates on its axis about once every 27 days. ... Just follow the sunspots . ... It shows the Sun's visible surface for most days of August 1999 so that the same sunspots appear many times as the solar rotation carries them across the face of the Sun . ... Publications with keywords: Sun - solar rotation - sunspot . Publications with words: Sun - solar rotation - sunspot . ...

REPORT ON THE SIMONS­IUM FELLOWSHIP 2013 AND DYNASTY FOUNDATION ILYA VYUGIN Results of the 2013 year On solvability of linear differential systems. ... On the linear indep endence of the system of functions. Consider the scalar Fuchsian linear diferential equation u(n) + b1 (z )u( n-1) + . ... The system consists of products of the functions xt and powers of fundumental solutions yi i (x) of some linear differential equation. ... Linear differential equations: monodromy, singular points. ...