... 7.11.2014 . ... Over 20 million light-years away and swimming within the boundaries of the constellation Pisces , NGC 660's peculiar appearance marks it as a polar ring galaxy . A rare galaxy type, polar ring galaxies have a substantial population of stars, gas, and dust orbiting in rings nearly perpendicular to the plane of the galactic disk. ... Broader than the disk, NGC 660's ring spans over 50,000 light-years. ... November 2014 . ... Publications with keywords: polar ring - galaxies . ...

... 2011 January 22 . Polar Ring Galaxy NGC 660 . ... A rare galaxy type, polar ring galaxies have a substantial population of stars, gas, and dust orbiting in rings nearly perpendicular to the plane of the galactic disk. ... The polar ring component can be used to explore the shape of the galaxy's otherwise unseen dark matter halo by calculating the dark matter's gravitational influence on the rotation of the ring and disk. Broader than the disk, NGC 660's ring spans about 40,000 light-years. ...

The AstroGuide . ... AstroGuide | ... AstroGuide Listing . ... See many more Astronomy Listings by: Category or Alphabet . ... Listed Since October 22, 1998 . ... 203) 484-7705 . ... 203) 484-9016 . Web Site . ... Web . www.astronomy.net . About Astronomy Net | Advertise on Astronomy Net | ... Unless otherwise specified, web site content Copyright 1994-2016 John Huggins All Rights Reserved . dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

... The HST uses an onboard model of its orbit to perform in real-time various control functions relating to spacecraft operations and observation support. ... New coefficients for the ephemeris are updated every other day, and are archived as FITS keywords for each HST observation data set. Using these coefficients,an observer can perform a variety of calibration and characterization calculations relating to the orbital position and velocity of the telescope. ...

Seven months ago, on Mar 19, 2008, at 09:12 Moscow time, a new star appeared on the sky. The Sun had already risen over the Russia, but people of the Western hemisphere might be able to see by their eyes a faint starlet near one of Bootes constellation stars. This starlet appeared and faded by an order of magnitude in a minute. Astronomers named it GRB080319B or, informally, the Naked-Eye Burst, as it was twice as bright as human eye can see a star. ... Royal Astronomical Society . ...

Chapter 5. Listing of Installed Components . ... An X driver (/usr/X11R6/lib/modules/drivers/nvidia_drv.so); this driver is needed by the X server to use your NVIDIA hardware. ... An X module for wrapped software rendering (/usr/X11R6/lib/modules/libnvidia-wfb.so.x.y.z and optionally, /usr/X11R6/lib/modules/libwfb.so); this module is used by the X driver to perform software rendering on GeForce 8 series GPUs. ... See Chapter 4, Installing the NVIDIA Driver for a more thorough description. ...

... Adding a regular grid of antennas around the compact component gives a uniform UV coverage for correlations between the compact component and the grid of antennas. ... Antenna configuration Regular grid of antennas One of 2 Compact Components UV coverage Regular grid of antennas One of 3 Compact Components Figure 3 Configurations with 2, 3 and 4 compact components One of 4 Compact Components Regular grid of antennas Figure 4 Examples of antenna configuration with a large number of compact components...

A study of the size and composition of dust grains in the circumstellar envelope of IRC + 10 o 216 S. Bagnulo, J.G. Doyle and I.P. Griffin We utilise a modelling technique in which a generalised two­stream Eddington approximation is applied to the problem of the radiative transfer in a spheri­ cally symmetric dust shell. ...

... Bojan Nikolic web pages (r. 329) . ... We present a Bayesian approach to calculating the coefficients that convert the outputs of ALMA 183 GHz water-vapour radiometers into estimates of path fluctuations that can be used to correct the observed interferometric visibilities. ... Inference of Coefficients for Use in Phase Correction . ... Simulating Atmospheric Phase Errors, Phase Correction and the Impact on ALMA Science . ... Copyright 2005 -- 2016, Bojan Nikolic feedback welcome ...

... Archives . ... The PCA and ICA is used for separating mixed components with some assumptions. ... The need of source separation methods in astronomy has led various adaptations of decomposition methods available. ... I rarely come up with a paper which gathered and summarized component separation methods applicable to astronomical data. In that regards, the following paper seems useful to overview methods of reducing dimensionality for astronomers. [arxiv:0805.0269] . ... Chandra Blog . ...

... STScI-PRC97-07 Hubble Camera Resumes Science Operation With Picture Of "Butterfly" In Space. The Hubble Space Telescope's Wide Field and Planetary Camera 2 (WFPC2) is back at work, capturing this black-and-white image of the "butterfly wing"-shaped nebula, NGC 2346. ... Credit: Massimo Stiavelli (STScI), and NASA other team member: Inge Heyer (STScI) Image files in GIF and JPEG format and captions may be accessed on the Internet via anonymous ftp from oposite.stsci.edu in /pubinfo. ...

... DpmkSpace (part of SAS) . Cdb server (part of calibDB, in Garching only . Dpserver (part of SA, in Garching only) More about P2PP checks to be performed when installing/configuring it. Go to top of page . More about OT-tcl/tk checks to be performed when installing/configuring it. ... More about Java-OT checks to be performed when installing/configuring it. ...

Taking into account the result by Watanabe P=2.5 days in outburst, I reconstruct old set of photographic observations being partly lost, and add some new observations. ... The periodogram calculated with the method by Lafler and Kinman is shown. ... The last periodogram indicates peaks corresponding following possible periods with the double-wave light curve: 0.4236, 0.4650, 0.5379, 0.6064, 0.7365, 0.871, 1.168, 1.5437, 2.8173, and 6.89 days. ...

. Search this album . Gallery . :: The First 100 Years . :: Workshops and computer labs . :: Richard Woolley and Jim Banham inspecting optтАж . Sidebar Left . Sidebar Top . No Sidebar . Sidebar Bottom . Sidebar Right . View full size . Title: Richard Woolley and Jim Banham inspecting optical and mechanical components, optical munitions factory, 1944 . File name: OpticalMunita.jpg . Dimensions: 800 x 601 px . Page: 1 2 3 4 5 6 7 8 9 10 24 25 . Powered by Gallery 3.0.9 (Chartres) . Login

Method of Calculating Cometary Orbits . ... A method of constructing a numerical theory of comet motion covering large intervals of time is presented. ... Very Long Baseline Interferometry (VLBI), Near Earth Objects (NEOs), calculating cometary orbits, numerical theory of comet motion covering large intervals of time , radial component of non-gravitational acceleration , transverse component of non-gravitational acceleration , normal component of non-gravitational ...

... OEM COMPONENTS . ... OEM OPTICAL COMPONENTS . ... Objective, Plan Achromatic, 4 X 0.12, BF . ... Objective, Flatfield Achromatic, 20 X 0.40, BF . ... Objective, Flatfield Achromatic, 60 X 1.00-0.70, Oil, Iris, BF . ... Objective, Flatfield Achromatic, 100 X 1.25, Oil, BF . ... Q-Plan™ Achromat Objective, 2.5 X 0.08, BF . ... Q-Plan™ Achromat Objective, 50 X 1.0-0.70, oil, iris, BF/DF . ... Q-Plan™ Achromat Objective, 100 X 1.25, oil, BF . ... Q-Plan™ Achromat Objective, 100 X 1.30, oil, iris, BF/DF ...

... In this first example, we allow an object to fall onto a small radar unit . The resulting Time-Frequency distribution is shown as a contour plot in Fig. 8 (a). Figure: FIGURE GOES SOMEWHERE IN THIS GENERAL VICINITY . ... Its density plot appears as an image in Fig. ... The response has a very high peak, as evidenced from Fig. ...

II-VI compound crystal growth, HPVB & HPVZM basics . ... Developed and first time applied for II-VI compound crystal growth in our lab back in late sixties [1]. ... Basics . The II-VI compounds have particular physical-chemical properties that present a challenge for the crystal growth. ... In the general case of II-VI compounds and HPVB growth conditions: . ... These peculiarities of composition stipulate another problem of the II-VI compound crystal growth from the melt - "bubbles". ...

Next: Extinction efficiencies: general behaviour Up: Optical properties of cosmic Previous: Optical properties of cosmic . It is now evident that observed interstellar extinction cannot be explain using particles of only one kind. ... The intensity of radiation after passing a dust cloud is equal to . ... The interstellar extinction is . ... Next: Extinction efficiencies: general behaviour Up: Optical properties of cosmic Previous: Optical properties of cosmic root 2003-04-09 ...

... ASCOM FITS driver/ . 08-Sep-2007 12:16 . ... 24-Jan-2006 13:45 . ... 2.6K . ... Apache/2.2.14 (Ubuntu) Server at vega.inp.nsk.su Port 80 ...