... Hartmann Test Using a Screen With Four Holes 2 Hartmann test with four holes screen The theoretical concept of the primary aberrations measurement by four apertures Hartmann test introduced by "Malacara" * and "SalasPeimbert et. al. ... Black curve show the calculated coefficients for phase screens which have 8 modes of Zernike aberrations and red curve show the calculated coefficient for original phase screen. (a) astigmatism 45 (b) astigmatism 090 14 Coma Coma modes of Zernike aberration. ...

... 14 июня 2000 . ... Ломтик Вселенной от 2dF . Благодарности: Matthew Colless ( ANU ) et al. , 2dF Galaxy Redshift Survey . Пояснение: Что можно увидеть, глядя сразу на 100000 галактик? ... Благодаря их работе теперь можно увидеть распределение галактик во Вселенной на расстояниях до 4 миллиардов световых лет. На приведенной выше 2dF-карте видны огромные кластеры , длинные нити и гигантские пустоты с характерными размерами более 100 миллионов световых лет . ...

. Red dots are the 2dF QSO Redshift Survey . Blue dots are the 2dF Galaxy Redshift Survey . | Front page | . | << - Survey status | Number counts - >> | . Robert J. Smith, ">rsmith@mso.anu.edu.au Last modified: Fri Sep 24 11:39:02 EST 1999 .

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This section of library contains information about "classic" Star Catalogs. ... For a Henry Draper Catalog 272149 stars have received a total of 531,211 identifications in 7 сatalogs: . 270456 - in Astrographic Catalogue ( "Carte du Ciel", 4M), . 251943 - in Guide Stars Catalog (GSC), . ... A file with information on the components of 1788 of multiple systems in catalog HDEC (3681 component, or a combination thereof, with 4054 recording). ... A file with information about 21971 variable stars. ...

... See you all on February 8th! ... David Lechter, Outreach Chair 2 February 2011 Amateur Astronomers Association of Princeton Mars Rovers Celebrate 7th Anniversary on the Red Planet NASA's twin Mars rovers Spirit and Opportunity surely rank as one of the greatest triumphs in the history of space exploration. ... 4 February 2011 Amateur Astronomers Association of Princeton Opportunity is driving to different vantage points around the steep walled crater and snapping a series of gorgeous Martian vistas....

Please enter the lightcurve file name and period search parameters: . Lightcurve file: . ... Apply the Heliocentric correction and convert all dates to Terrestrial Time (TT)? ... Phase range for plots: -0.5 to 1.0 0.0 to 2.0 0.0 to 1.0 . ... Also, the Heliocentric correction cannot be applied to such lightcurves. ... Two period search methods are currently implemented. ... This period search service is also available at the mirror sites: Mirror 1 , Mirror 2 , Mirror 3 , Mirror 4 . ...