... Galaxies with polar rings (PRGs) are a unique class of extragalactic objects, consisting of a ring or disk of gas, stars and dust orbiting in a plane nearly perpendicular to the disk of a central galaxy. ... At present, there are only about two dozen kinematically confirmed galaxies in this PRG class, mostly from the Whitmore et al. (1990) catalogue, based on photographic images. ... Examples of object from our catalogue SPRC (=SDSS-based Polar Ring Catalogue). ...

... New method (reproject). ... Version 2.6 - 2003-04-22 (CG) ----------- + C++ compliance increased (required by gcc3.2) + DEPEND changed (dal instead of dali) Version 2.5 - 2002-08-21 (UL) ----------- + now DEPENDs on package sas Version 2.4 - 2002-07-08 ( JDR ) ----------- - requires cal-3.142 - BACKSCAL in HTR mode is now computed using the model background distribution from the CCF Version 2.3 - 2002-05-29 ( JDR ) ----------- - propagates EXPIDSTR from input to output, if present ...

Using the Huygens and Babinet principles van de Hulst [ 11 ] considered the problem of light scattering and extinction by a particle having the size and the refractive index . ... The absorption cross-section is . ... The range of applicability of the anomalous diffraction theory for the scattering amplitude is limited by small angles, however the formules for the cross-sections became good approximations for a wide class of particles. ... This problem for spherical particles was solved by A.Ya. ...

... We have measured this "redshift" for the pink black holes, and allowed for it in our calculations. ... We see this effect in the emission from gas around these pink black holes, but it is far too small an effect to account for the pinkness. Thus the swirling motions of gas around or into the black holes cannot produc the colour. ... At first we thought that these things were normal blue black holes hidden behind clouds of interstellar dust, that absorbed the blue light and made them appear pink. ...

... GRIN lenses for telecommunication optics applications ? GTC (gradient telecom) lenses. ... GTC lenses are used in different fiber-optic devices: collimators, couplers, isolators and WDM etc . ... 2.Diameter . GTC lenses diameters are 1.0 mm, 1.8 mm, 3.0 mm and 4.0mm. ... 1.0 mm -3.0 mm diam GTC lenses are supplied in 0.22P, 0.23P, 0.25P, 0.27P and 0.29P length. 4.0 mm diam GTC lenses are supplied in 0.11P length. ... GTC . ... 3 scratches with 5mkm max width and 200mkm max length are allowed . ...

... 2015 January 12 . Super Planet Crash . ... Super Planet Crash , the featured game, allows you to try. To create up to ten planets, just click anywhere near the central star. Planet types can be selected on the left in order of increasing mass: Earth , Super-Earth , Ice giant , Giant planet , Brown dwarf , or Dwarf star . ... As you might suspect after playing Super Planet Crash a few times, there is reason to believe that our own Solar System has lost planets during its formation. ...

... Credit Copyright: Stefano Meschiari ( U. Texas at Austin ) the SAVE/Point Team Explanation: Can you create a planetary system that lasts for 500 years? Super Planet Crash , the featured game, allows you to try. To create up to ten planets, just click anywhere near the central star. ... The game ends after 500 years or when a planet is gravitationally expelled. Many exoplanetary systems are being discovered in recent years, and Super Planet Crash demonstrates why some remain stable. ...

Next: HST-NICMOS Observations of Galactic Up: NICMOS Science Previous: A Color Analysis of . ... Why choose NGC 1569? ... NICMOS Data in the Central Region of NGC 1569 . ... To have a census of the old stellar populations of the dwarf irregular galaxies NGC 1569 and NGC 1705 and to trace the major episodes of star formation over a Hubble time in these starbursting systems, we have applied for and obtained HST/NICMOS observations in the F110W and F160W bands with the NIC2 camera. ...

... Tonight's Sky . ... The Magazine . ... solar system . ... Solar system formation doesnт??t mean a thing without that spin . New modeling shows that the supernova shock wave that helped form the Sun also could be responsible for the spin of our solar system. ... The new modeling work from Boss and Keiser shows that this shock injection could have been responsible not only for the distribution of the isotopes now found in primitive meteorites, but also for the spin of our solar system. ...

The Race to the Planets Leader Kit is the second release in our series of family events and activities on topics in astronomy for Family ASTRO Event Leaders . It allows you to take your Astronomy Event participants on a hands-on tour of the Solar System. ... Follow one or more of the links below for more information on the "planet tour" you want to take ( note that Frequently Asked Questions about Race to the Planets can also be found by clicking on these links ): . ... Race to the Planets . ...

... The first domestic liquid-propellant rocket engine with afterburning of generated gas in a combustion chamber allowed to achieve a specific impulse of up to 340 kgf s/kg in vacuum when using main components. ... Fuel components: . ... fuel . ... The engine has a more heat-intensive combustion chamber, therefore, RG-1 is used as fuel. When launching heavy-lift spacecraft, synthine can be used in the capacity of fuel without re-designing the engine. ... Official WEB-site of S.P.Korolev RSC Energia . ...

Next: Select a circle around Up: Image Display in Xwindows Previous: The SAOimage Menu (options . SAOimage allows the interactive building of a spatial region that can be fed to other IRAF tasks ( e.g. , imcnts, see Features of PROS Software , Radial Profiles and Projections ) to sum up counts etc. ... N.B.: If you are working with a blocked or sectioned image, the region will be created in the corresponding coordinates. ... A Region mask for a radial profile in concentric, elliptical annuli . ...

... 8, ``Celestial Mechanics'', 2002 Canon of solar eclipses in Russia for the interval 1000--2050 M. V. Lukashova, L. I. Rumjantseva Institute of Applied Astronomy, St. Petersburg, Russia Solar eclipses are quite rare events. ... The Canon contains the basic data about the solar eclipses observed in ter­ ritory of the former USSR (in boundaries of 1990) from 1000 to 2050 with the magnitude of phase exceeding 0.1. ... Beginning from 1887 several canons of solar eclipses were published. ...

... part 2 | ... Part 1 . The new concept of formation and development of the Solar system. ... Thus, the initial pulse of the rotation of a protosolar cloud of the solar system was determined as a result of the diversion of a part of the moment of the rotational pulse of the Galaxy. ... Besides this new approach to the pre-solar system as a system of the destroyed vortex structure, we can understand now a number of other peculiarities of the Solar system's structure. ...

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... FTP access the basic models is here . ... Below, we put short descriptions of the used SED models for the photometric redshifts providing by the current server . ... The uniqueness of this model consists in expanding to the near IR (NIR) of Rocca-Volmerange and Guiderdoni's (1988) atlas of synthetic spectra with a revised stellar library, which includes parameters of cool stars. ... Homepage of the GISSEL model). ... Another model used earlier is the model of synthetic spectra of Poggianti (1997). ...

Some remote hosts are set up to allow you to open an ftp connection to them even though you don't have an account on them. ... The convention is to use the username anonymous or ftp and then give your email address in place of a password. Once you are connected to this type of host you can use the usual ftp commands and get any file(s) from amongst these that you are allowed access to. This type of host is used to hold public archives of documents, data and software. ...

Spinar Paradigm and Central Engine of the All Types Gamma Ray Bursts V.Lipunov1,2,3 & E.Gorbovskoy1,2,3 1Sternberg Astronomical Institute, Moscow, Universitetsky pr. ... A spinar is a quasi-equilibrium collapsing object whose equilibrium is maintained by the balance of centrifugal and gravitational forces and whose evolution is determined by its magnetic field. ... 10 Computed energy release during the process of collapse with low angular momentum and weak magnetic field. [pic] Fig .11. ...

To main of Laboratory . The research work and design of optical and optical-electronic devices are carries out by laboratory staff: . ... Lens: . ... In the layout 1 prism systems perform functions of dispersive element, corrector of aberrations, optical reducer. ... Spectral range 200 - 400 nm; . ... Back Forward . ... The main corrector's function are compensation of field aberrations of the main spherical mirror of a telescope (diameter of 600 mm, f'=1200 mm) and increase aperture ratio. ...

... A .WAV editor, it allows recording, editing, playing, and saving .WAV files. o Creative Ensemble AV. ... This is just a simple mixer w/o the tone controls. o Creative Mosaic. ... This is a control app. that allows the user to switch in a different Synthesizer Bank, etc. At the most basic level, it allows you to switch from GM, GS, and MT32. ... In "SB Explored" article, Daron Myrick claimed that the Vibra chipset did allow tone controls but only when certain registers are programmed. ...