... The accuracy of the RESIK measurements allows photospheric and coronal abundance sets, important for the free­bound continuum, to be discriminated. ... The FB emission depends on the set of abundances used in the calculations, a coronal set (Feldman 1992; Fludra & Schmelz 1999) giving rise to greater emission than a photospheric set (Grevesse et al. ... Right panel: continuum fluxes compared for coronal (Feldman 1992) and photospheric (Grevesse et al. 2007) abundances for Te = 15 MK. ...

... Home Articles Why is the Moon so high (or so Low)? ... Clear Sky Chart . This Month's Sky . ... Beyond New York City . ... Why is the Moon so high (or so Low)? ... Observing Resources for Amateur Astronomers - Part 1: Beginning Observers . Observing Resources for Amateur Astronomers - Part 2: Intermediate Observers . ... A History of the First Forty Years of the Amateur Astronomers Association . ... 2016 Amateur Astronomers Association of New York Designed by Press Customizr Powered by . ...

... All circuit parameters have been presented in a symbolic form. ... To use the program you will need a CIR file (PSpise, DesignLab file) of your circuit. CIR file examples have been enclosured: bpasside.cir, test1.cir, test2.cir, test3.cir, test4.cir, laksamp.cir, bridge.cir, uA741acf.cir, quartz.cir. ... Ideal operational amplifier (nullor) * Nname n1 n2 n3 n4 * * In the ideal op amp data, (n1,n2) represent output nodes, * (n3,n4) represent input nodes (noninverting, inverting). ...

... Moon Phase below . ... ARTICLE: Why the moon always shows us the same face . ... Before you continue reading, you should know that this was not always the case, i.e. the Moon once was rotating with respect to the Earth, so that on every night a terrestrial observer (if there was one, because this was long, long before mankind appeared on our planet, and even before any major animals had appeared) saw another face of the Moon. ... Figure 1 (not to scale) shows how we can imagine the system Earth-Moon...

... Oleg V. Verkhodanov . ... The last few years have changed our view on the evolution of galaxies: the most distant galaxies (i.e. systems having stellar population) have been found at redshift z=6.68 (Chen H.-W., Lanzetta, K. M., Pascarelle, S. 1999, Nature, 398 , 586) and radio galaxy at z=5.19 (van Breugel W., De Breuck C., Stanford S. A., Stern D., Rottgering H., Miley G. 1999. astro-ph/9904272 ). ... Redshifts and age of stellar systems of distant radio galaxies from multicolour photometry data. ...

Abstract -- Calculations are performed for the circular polarization of maser radiation from a turbulent, Keplerian disk that is intended to represent the sub-parsec disk at the nucleus of the galaxy NGC4258. ... This turbulence, along with the Keplerian velocity gradients and the blending of the three hyperfine components to form the 6 16 --5 32 masing transition of water, are key ingredients in determining the appearance of the polarized spectra that are calculated. ...

... Сегодня: 10 апреля 2016 г. На заводе компании Lockheed Martin успешно завершились испытания модуля целеуказания Pointing and Control Assembly (PCA) для инфракрасной системы наблюдения космического базирования Space Based Infrared Systems (SBIRS). ... Системой SBIRS будут оснащены спутники будущей системы противоракетной обороны и предупреждения о ракетных запусках. ... Завершены испытания одного из ключевых элементов спутника будущей американской системы ПРО . ...

RADIOASTROPHYSICAL DEPARTMENT • INSTITUTE OF SOLAR-TERRESTRIAL PHYSICS RAS SB . ... SSRT - Possibilities of observing . ... Investigations of the SSRT 5.7 GHz radio maps in conjunction with images obtained in other emission ranges, suggested the following conclsions: . ... Solar images obtained in line H a ;(on the left, 16:11 UT, Big Bear observatory) and in the microwave emission (on the right, 04:04 UT, SSRT) 4 march 1997 . ...

The low aspect ratio, or spherical tokamak Globus-M [1] has recently been built in a support of international spherical tokamak plasma investigation program. ... The survey to determine the work scope in diagnostic design for Globus-M is given in the paper. ... The next one is an advanced diagnostic set intended to supply the data on basic plasma parameters: electron temperature and density profiles, ion temperature, plasma composition, radiation profile, Zeffective. ... Magnetic Diagnostics. ...