... the radiative transfer equation (RTE) for the randomly-irregular magnetized plasma has been derived on the base of general grounds of the multiple scattering theory . ... Solutions of several absolute tasks of the scattering theory have been obtained (on the optical depth of the ionospheric plasma layer, on the value of radio wave anomalous attenuation, on anomalous refraction, on the backscattered signal intensity for the source being placed within a plasma layer). ...

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... Observing . ... Solar Observing . ... April 3 (SUN) - Solar Observing, Central Park , Manhattan . ... APRIL'S SKY . ... Lecture Series at the American Museum of Natural History The Amateur Astronomers Association is proud to present an astronomy lecture series from October through May each year for our members and the .. ... The€аAmateur Astronomers Association of New York€аwas organized in 1927 to promote the study of Astronomy, emphasizing its cultural and inspirational value. ...

... Laboratory and theoretical modelling of the UV bump on the interstellar extinction curve is a very popular topic in dusty investigations. ... feature is illustrated by Fig. 10 where the profiles were calculated using the model of graphite spheres. Figure 10: Normalized extinction efficiencies for graphite spheres. ... The lower panel shows the summary extinction of two graphite spheres with radii and (from upper panel) taken in equal proportions. ...

... 2014 October 6 . Space Station Detector Finds Unexplained Positron Excess . ... Explanation: Where did all these high energy positrons come from? The Alpha Magnetic Spectrometer (AMS-02) onboard the International Space Station (ISS) has been meticulously recording how often it is struck by both high energy electrons and positrons since 2011. ... Follow APOD on: Facebook , Google Plus , or Twitter . ... About APOD | ...

... Readout Modes and Read Noise ----------------------------- The detector may be read out using Correlated Double Sampline (CDS), Multiple CDS (MCDS, a.k.a. Fowler sampling), or up-the-ramp (UTR) modes. ... Read noise is about 11 e- per CDS read. ... A read noise of about 2 e- is achieved for 88 reads (130 s integration time), based on test data taken in early Feb 2013. ... All exposure times are quantized to be multiples of this, so the possible exposure times are 1.45 s, 2.91 s, 4.35 s, and so on. ...

... Credit Copyright: Ron Garan , STS-134 Crew , Expedition 28 Crew , NASA Explanation: Where did all these high energy positrons come from? The Alpha Magnetic Spectrometer (AMS-02) onboard the International Space Station (ISS) has been meticulously recording how often it is struck by both high energy electrons and positrons since 2011. ... The excess may have a very exciting and profound origin -- the annihilation of distant but previously undetected dark matter particles. ...

... Neutral hydrogen observations of the spiral galaxies NGC 6221 and NGC 6215 with the Australia Telescope Compact Array (ATCA) reveal a wide, two-stranded bridge of at least 3 x 10^8 Msun which can be traced between the two galaxies over a projected distance of 100 kpc. ... The color figure below shows the HI emission (blue) in the bridge velocity range overlaid onto an optical image. ... A tidal HI bridge is visible between NGC 6221 and its brightest neighbour, NGC 6215 (v_sys = 1555 km/s). ...

The Robinson Schools Lecture will be delivered in the Royal School Armagh, College Hill, Armagh, at 2.00 pm on Friday, 21st November 2008. ... Pupils should plan to arrive at the school by approximately 1.30 pm and proceedings should be finished by approximately 3.00 pm. ... Schools may also wish to consider sending a party of senior pupils to the Observatory's biennial Robinson Lecture "God and the Universe", which is to be held at 8.00 pm, Thursday 20th November, in the Armagh City Hotel, Armagh. ...

... The handouts, examples sheets etc. for this course will be available the course page of the Cavendish Teaching website, for registered users. ... As the course progress, below I will put links to resources on the Web that relate to various topics discussed in the lectures, as the course progresses. Some are links to published papers, the full text for which is either freely available, or should be available via the University's subscription, if accessed from cam.ac.uk addresses. ...

Winer Observatory P.O. Box 797, Sonoita, Arizona 85637-0797, USA . ... Irvin M. Winer . ... Site Map . ... Hint : Find and stay on Arizona State Route 83, which bounds our property). Use the interactive map below or use our GPS position N31 39' 56.08" W110 36' 06.42" (or 31.665578N, 110.601783W). ... From Tucson, take I-10 east about 20 miles to Exit 281, which is marked "State Route 83 Sonoita/Patagonia". ... Go three miles, staying on the paved road of State Route 83. ... 2013 Winer Observatory. ...

home events . SEARCH ASP SITE: Match ALL words Match ANY word . ... Public Lectures . ... Special Events . Kepler Mission Planet Discoveries . NASA Ames Research Center . ... Scientists involved with the search for planets around other stars are gathering at NASA Ames Dec. 5 - 9 for a technical conference devoted to the Kepler spacecraft discoveries. Tuesday evening, Dec. 6th, there will be a public event from 7 to 10 pm at the NASA Ames Research Center in Mountain View. ... events | ...

Lab . Main page News People . ASA . Master . Master net Homepage . ... Lomonosov Moscow State University Sternberg Astronomical Institute . ... MASTER . ... Lomonosov (ShOK) . ... About Space Monitoring Laboratory, scientific directions, instruments, contacts . People, who work in lab . Latest news and news archive . ... Gamma-Ray Bursts observations . Theory of Gamma-Ray Burst formation . ... MASTER (Global Robotic optical monitoring system) . ... All news ...

Our understanding of star formation in galaxies is facilitated by observations, at multiple wavelengths, of emission which traces stellar populations. ... Using optical integral field spectroscopy, my work aims to better understand the local SFR calibrations, which use H-alpha and radio continuum emission, when applied to different regions of a galaxy, as well as to galaxies as a whole. ...

... ALGEBRAIC GEOMETRY . ... You can download at once all available printed matters on this course (they are organized in 74 pages text book) as 791 Kb of gzipped PostScript . of this course can be downloaded from here either as zipped PostScript or as gzipped PostScript file. ... You can download either zipped PostScript or gzipped PostScript file. ... Geometry of skew commutative polynomials: Grassmannians. ... at the Independent University of Moscow), Spring 2002 . ... Zipped postscript (20K) ] . ...

... Tonight's Sky . ... Observing . ... Sky this Month . ... Astronomy for Kids . ... Can you explain Mercury's retrograde motion? Do other planets appear to do this also? ... When astronomers talk about retrograde motion, generally they refer to the apparent motion outer planets make as Earth passes them while orbiting the Sun. ... Get instant access to subscriber content on Astronomy.com! ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ...

... Bad Astronomy . Misconceptions . ... Bad Astronomy : The sky is blue because it reflects light from the oceans. Good astronomy : The sky is blue because it is scattering blue light from the sun. ... So everywhere you look you see blue photons, except directly from the Sun, where you'll see all colors. ... The sky does not look blue near the horizon because more yellow photons (and even orange ones right at sunset) are coming from that direction as they get scattered away from the Sun. ...

... An interactive IRAF task for the analysis of Extreme Ultraviolet Explorer ( EUVE ) emission line spectra is presented. The line flux in extracted spectra may be measured by multiple techniques, including fitting individual lines. ... To aid in identifying lines, the positions of known lines may be marked on the spectrum during the fitting process. Also, model EUVE spectra may be constructed and overlaid using plasma emissivities and source emission measures supplied by the user. ...

spaceweb@oulu.fi - last update: 28 May 1995, 0800 UT . Advanced plasma theories are extremely important when one tries to explain, for example, the various waves and instabilities found in the plasma environment. ... In the kinetic theory it is necessary to know only the distribution function for the system of particles. ... The dependence of the distribution function on the independent variables r , v , and t is governed by an equation known as the Boltzmann equation . ... Hot plasma theory . ...

The parameter multiple takes the value M if the object belongs to a multiple system. For example, a galaxy belonging to a pair of galaxies have multiple=M . Presently multiple accounts for the association in projection on the sky and therefore does not reflect for sure a physical association: members of "false" pairs will have multiple=M . ... The simple membership to a cluster of galaxies does not imply a galaxy to carry multiple=M . ... HyperLeda . ...