The Hubble orbiting telescope. The Earth's atmosphere, while transparent to visible light, absorbs most "electromagnetic radiations" which belong to the same family as light: parts of the infra-red (IR) and all of the ultra-violet (UV), X-rays and gamma rays. ... The Hubble telescope , in low Earth orbit, overcomes such limitations, in the visible range and in part of the UV. ... Some satellites specialize in observing the Sun, such as the Japanese Yohkoh and NASA's SOHO . ...

... Fitting the observed dependence includes calculations of the polarization cross-sections averaged over particles orientation and size distribution, their normalization and the comparison of obtained dependencies with Serkowski's curve representing observational data for a chosen star. ... Variations of the polarization factors with wavelength are shown in Fig. 16 for homogeneous spheroidal particles with PF orientation. ... The distinction between prolate and oblate spheroids is also clearly seen. ...

... Posts tagged ?model comparison? ... Dong-Woo, who has been playing with BEHR , noticed that the confidence bounds quoted on the source intensities seem to be unchanged when the source counts are zero, regardless of what the background counts are set to. ... Tags: Banff Challenge , Bayesian , BEHR , Dong-Woo Kim , model comparison , posterior probability , zero counts . ... 7 Comments . ... Entries RSS . Comments RSS . ... vlk on [MADS] Parallel Coordinates . ... Entries (RSS) and Comments (RSS) . ...

OBSERVATIONS OF COORBITAL SATELLITES OF SATURN Emel'yanov N., Varfolomeev M. Sternberg State Astronomical Institute, Moscow, e-mail : emelia@sai.msu.ru Institut de MИcanique CИleste et de Calcul des иphИmИrides, Paris, e-mail : emelia@imcce.fr Abstract. To improve the orbital parameters and masses of coorbital satellites of Saturn, Janus and Epimetheus, new observations of these satellites are necessary. ... IN: Saturn. ... New observations of Saturn's coorbital satellites" - Icarus. ...

... The choice of the spectrograph design (Fig.2) is determined by the quantity R, the overall dimensions of the PF cage and the restrictions on the rigidity of the structure of the device. ... As the camera's objective a fast 4-lens aplanat is used having a focal distance F cam =140 mm and a relative aperture of 1:1.8, the resolution at the centre is no less than 80 gr/mm, that over the field at a distance of 3 mm from the edge along the frame ( ) diagonal is 35 gr/mm. ...

... Solar Eclipses in 2009 : . There are two eclipses of the Sun (an annular eclipse on January 26 and a total eclipse on July 21-22 ) in 2009. ... Annular Solar Eclipse . ... Annular Eclipse of the Sun on January 26, 2009 . ... Beginning of northern limit of umbra . ... Beginning of center line; central eclipse begins . ... Central eclipse at local apparent noon . ... Total solar eclipse . ... An annular eclipse occurs when the apparent disk of the Moon is smaller than that of the Sun. ... Umbra: . ...

Weekly Bulletin on Solar and Geomagnetic Activity Highlights on 13 - 19.04.2015, Forecast on 20 - 27.04.2015, Carrington RotationЫ 2162, 2163 (27,93.03; 24,21.04.2015) SUNSPOT-FORMING ACTIVITY OF THE SUN WAS AT THE AVERAGE LEVEL ALL DAYS. ... SUNSPOT-FORMING ACTIVITY IS EXPECTED TO BE AT AVERAGE TO LOW LE- VELS. ... BY DATA OF CORONOGRAPHS SOHO AND STEREO WERE OBSERVED > 32 CME FROM WHICH TWO WERE "HALO" TYPE, ONE - "PARTIAL HALO III" TYPE AND TWO - "PARTIAL HALO II" TYPE. ...

The AstroGuide . ... AstroGuide | ... News | ... AstroGuide Listing . ... See many more Astronomy Listings by: Category or Alphabet . ... Listed Since August 20, 2005 . ... Web Site . http://www.assne.org/ . ... 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" . ...

... Zacharias, N. & Zacharias, M. I. 1999, in ASP Conf. ... The USNO CCD Astrograph Catalog South (UCAC-S) project is a high precision astrometric survey of the entire southern hemisphere for the 7 - 16 magnitude range, aiming at an accuracy of 20 mas for 8-14 m stars. ... The ACT (Urban et al. 1998) and the Hipparcos and Tycho Catalogues (ESA 1997) are used as reference (UCAC-R), supplemented by an extragalactic link program carried out in parallel mainly at the Cerro Tololo (CTIO) 0.9-meter telescope....

... Glxy SB(s)b pec : Non-Existent Glxy S? Glxy SB(rs)cd: Glxy SAB(rs)0: Mag Alias/Notes 14.4 ESO 403-15 MCG -6-47-11 VV 376 PGC 67192 14.2 ESO 403-16 MCG -6-47-12 PGC 67199 14.5 ESO 531-25 MCG -4-51-11 VV 800 IRAS 21407-2535 PGC 67248 13.3 ESO 403-27 MCG -6-47-14 PGC 67352 ESO 403-32 MCG -6-47-15 IRAS 21453-3511 PGC 67387 13 IC 5135 Glxy Sa pec sp Glxy E+ pec: Glxy Sab pec sp Glxy E pec: Glxy SB(s)bc pec: Glxy Sb Glxy SAB(rs)bc Glxy S(r)c:? ...

... Observing . ... Home Observing High Line ? Solar Observing . ... High Line . High Line - Solar Observing . ... Beyond New York City . ... Observing Resources for Amateur Astronomers - Part 1: Beginning Observers . ... A History of the First Forty Years of the Amateur Astronomers Association . ... The AAA hosts solar observing on the High Line one Tuesday afternoon each month from April through August. ... 2016 Amateur Astronomers Association of New York Designed by Press Customizr Powered by . ...

... We have observed and studied critical supercurrents, Ic, in cross-type Nb-Cu/Ni-Nb junctions with Josephson layers prepared from diluted ferromagnetic alloys. For suitable values of the exchange energy in the ferromagnet and the F-layer thickness we have observed Ic(T) oscillation with vanishing Ic for the definite values of T and dF. ... Critical supercurrents, Ic, in Nb-Cu(1-x)Ni(x)-Nb Josephson SFS junctions with F-layers prepared from ferromagnetic Cu(1-x)Ni(x) alloys have been studied. ...

The CHIANTI database consists of 4 primary ASCII files for each ion in the database. contains the energy levels in cm^(-1) It includes both experimental data and theoretical values of the levels energies. References: %Observed energy levels (2): Feldman, U., Curdt, W., Landi, E., Wilhelm, K., 2000, ApJ, 544, 508 %Observed energy levels (3,4,5): Sandlin, G.D., Bruekner, G.E., Scherrer, V.E., Tousey, R., 1976, ApJ, 205, L47 %Observed energy levels (6 to 15): Fuhr, J.R., et al., ...

... OOF . ALMA . ... OOF Index . Zernike Polys . GBT example . ... Observed data and analysis . The observed beam maps are shown in the first row of the table below. ... We show the best-fitting aperture and the best-fitting beams as the number of Zernike orders used for the fitting is increased. A sample OOF observed data set (top row) and the results of analysis with increasing number of Zernike polynomials used to parameterise the aperture. ... In-focus beam . ... Observed beams . ...

Тема : Coalsack Dark Nebula или Black Magellanic Cloud - темная туманность Угольный мешок (Caldwell 99) в созвездии южного полушария Крест / Южный Крест (Crux, Southern Cross, Crucis, Cru) .. ... Coalsack Dark Nebula или Black Magellanic Cloud - темная туманность Угольный мешок (Caldwell 99) в созвездии южного полушария Крест / Южный Крест (Crux, Southern Cross, Crucis, Cru) .. ... Поиск направления на Южный Полюс через звезды созвездия Крест / Южный Крест (Crux, Southern Cross) .: ...

... Among the newly observed objects, we discovered the galaxies UGC 2172 and NGC 3239 in the stage of a vigorous burst of star formation. ... A detailed presentation of the results is contained in the papers: Karachentsev et al. 2013, AJ, 145, 101; Karachentsev and Kaisina 2013, AJ, 146, 46; Kaisin and Karachentsev 2013, Astrophysical Bulletin, 68, 381. ... Karachentsev et al. ... An image of the interacting galaxy NGC 3239, which is a double (or a triple) system of merging dwarf galaxies . ...

... Current APO Weather . ... Search Site . ... Information for New Users . ... Technical Staff pages . Night Logs and Mailing Lists (maintained by APO) . ... Technical Documents and Database Search . ... Observer's Documentation and Procedures . ... Problem Reporting and APO Technical Documents Database Search . ... APO Drawing/Document Management Procedures . ... APO Technical Documents Database Search . Home Astrophysical Research Consortium . ... Mail Lists (maintained by APO) . ...

... Планетная система с тремя сверхземлями (4.2, 6.9 и 9.2 массы Земли) (The HARPS search for southern extra-solar planets. ... A planetary system with 3 Super-Earths (4.2, 6.9, 9.2 Earth masses)) . ... arxiv:0806.0657 Спектроскопическое подтверждение экстремально сильной вспышки звездообразования на красном смещении 4.547 (Spectroscopic Confirmation Of An Extreme Starburst At Redshift 4.547) . ... обзор arxiv:0806.0695 Перспективы изучения АЯГ на ALMA (Prospects for AGN studies with ALMA) . ...

Crater Gassendi . ... I made this drawing was made on the 26th of november 2001. If you compare this one with the previous drawing of Gassendi (below) the differences are clear. ... This drawing was made on the 28th of september 2001. After nearly a full month without observations I had a one hour gap between the thicker clouds. ... This drawing was made on the 29th of august 2001. ... This drawing was made on the 27th of august 2001. ... This drawing was made on the 25th of august 2001. ...