The nasa.gov site requires that JavaScripts be enabled in your browser. ... Contact NASA . ... The following are astronauts who are employed at NASA. Astronaut assignments and category definitions (e.g., "active" astronauts, "management" astronauts) are contained in a separate Flight Operations Directorate (FOD) policy letter. Astronaut . ... Acaba, Joseph M. 2004 . ... Aunon, Serena M. 2009 . ... Barratt, Michael R. 2000 . ... Burbank, Daniel C. 1996 . ... Cassada, Josh A. 2013 . ... 1998 . ...

THE SKY DISTRIBUTION OF 511 KEV POSITRON ANNIHILATION LINE EMISSION AS MEASURED WITH INTEGRAL/SPI Ё G. Weidenspointner1 , J. Knodlseder1 , P. Jean1 , G.K. Skinner1 , P. von Ballmoos1 , J.-P. Roques1 , G. Vedrenne1 , P. Milne2 , B.J. Teegarden3 , R. Diehl4 , A. Strong4, S. Schanne5 , B. Cordier5 , and Ch. ... The first sky maps in the 511 keV annihilation line and in the positronium continuum from SPI showed a puzzling concentration of annihilation radiation in the Galactic bulge region. ...

... 84, No. 4, pp. 380­384. i A Generalized Polarity Rule for Solar Magnetic Fields V. N. Obridko and B. D. Shel'ting Pushkov Institute of Terrestrial Magnetism, Ionosphere, and Radio Wave Propagation, Russian Academy of Sciences ... 142190 Russia Received August 23, 2006; in final form, October 12, 2006 Abstract--It is shown that, when all components of the large-scale solar magnetic field are longitudinally averaged, the N ... The large-scale fields spread all over the solar surface. ...

... The use of Astronomy in Research Based Science Education (RBSE), an NSF-funded Teacher Enhancement program, invites applications from middle- and high-school teachers interested in developing a research component for their science classes within the multi-disciplinary context of astronomy. ... 40 Years of Students Tracking Asteroids . ... Asteroids Finally Hit Project CLEA . ... LodeStar is a $32.8 million project dedicated to astronomy-oriented science education and research. ...

. --- Язык жестов - Дактильная азбука * Sign language - Dactyl alphabet --- . Выберите язык вводимого текста . Русский International Беларускi British Two Handed . Для перехода к следующей букве слова кликните мышкой по картинке после исчезновения стрелки под буквой . Введите в поле слово или отдельную букву . Дактильная азбука позволяет любое слово представить сочетанием жестов, каждый из которых обозначает соответствующую букву . Для начала демонстрации жестов нажмите кнопку . ї А. Воскресенский, 2000 .

. In February 2005, Cassini captured plumes of icy material extending above the southern polar region of Saturn's moon Enceladus. The monochrome view is presented along with a color-coded version on the right. The latter reveals a fainter and much more extended plume component. NASA / JPL / Space Science Institute

Surface photometry is a technique to measure the surface brightness distribution of extended objects (galaxies, HII regions etc.) ... Surface photometry and spectroscopic observations ­ two major observational methods of extragalactic astronomy. ... Presentation of surface photometric data 4. ... Presentation of surface photometry data Graphic methods Presentation of surface photometr y data Graphic methods Graphic methods Graphic methods 2D data are often reduced to a 1D brightness profile ­ I (r). ...

... VaST is a software tool for finding variable objects on a series of astronomical images. ... VaST performs object detection and aperture photometry using SExtractor on each image, cross-matches lists of detected stars, performs magnitude calibration with respect to the first (reference) image and constructs a lightcurve for each object. ... VaST FITS image viewer ./pgfv . ... Part I" PZP, vol. ... K. V. Sokolovsky, S. A. Korotkiy; "New Variable Stars Discovered by the NMW Survey" PZP, vol. ...