Calcium/Sodium in the Milky Way . ... We map out calcium II sodium I absorption - corresponding to Fraunhofer H, K D lines - induced by both the interstellar medium and the circumgalactic medium of the Milky Way. ... We show that the abundance of sodium with respect to neutral hydrogen stays roughly constant in different environments, while that of calcium decreases with column density. ... Here we show the maps of calcium and sodium in the Milky Way based on the obtained data. ... Projects | ...

STEP INTO THE BLUE - MEADE INSTRUMENTS PRODUCT GUIDE . ... Meade Instruments . ... LX850 Series . ... Coronado Accessories . ... Dealer Locator . ... Series 5000 Mega Wide Angle Eyepieces . ... The 100 degree apparent field of view MWA eyepieces currently are Meade s widest angle eyepiece. ... Mega Wide Angle Series 5000 Eyepieces use between 7 and 9 optical elements to achieve a high contrast image with razor sharp correction all the way to the edge of their huge 100 degree apparent field of view. ...

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... 237S (SIMBAD/NED BibCode) ================================================================================ Keywords: Sun: UV radiation - atmospheric effects - Sun: atmosphere - lines: identification Description: An ultraviolet atlas of the solar spectrum with a spectral resolution of 15mA in the region 1948-2000A is presented. ... The wavelength atlas with a list of about 550 lines has been synthesized from data at center of the Sun ({mu}=1) and at {mu}=0.89, smoothed out over an area of 30 arcsec. ...

... Exposure Time Calculator (ETC) . Survey processing . ... VISTA is a 4-m class wide field survey telescope for the southern hemisphere, equipped with a near infrared camera (1.65 degree diameter field of view at VISTA's nominal pixel size) containing 67 million pixels of mean size 0.34 arcsec and available broad band filters at Z,Y,J,H,K s and a narrow band filter at 1.18 micron. A wide field visible camera, if constructed, could also be used on VISTA. ... Tile . ... ESO VISTA Public Surveys . ...

... All the galaxies are divided into 4 groups depending on the environment type; every subsample contains more than 10 galaxies. ... An effect of environments is seen both for the nuclei and for the bulges: if we consider the clusters (Virgo and Ursa Ma jor) and group centers as dense environments and the field and group periphery as sparse environments, then in the dense environments the stellar populations of S0s are in average older by 4­5 Gyr than in the sparse ones. ...

astro-ph/0412656 Необычайно искривленный джет в PKS 2136+141 (An extremely curved relativistic jet in PKS 2136+141) . Authors: T. Savolainen et al. astro-ph/0412097 Звезды на хаббловском ультраглубоком снимке (Stars in the Hubble Ultra Deep Field) . ... astro-ph/0412652 Альтернатива темной материи: релятивисткая MOND гравитация (An alternative to the dark matter paradigm: relativistic MOND gravitation) . ... каталог astro-ph/0412641 Каталог пульсаров ATNF (The ATNF Pulsar Catalogue) . ...

... 6 я„пµпІяЂп°п»яЏ 2009 пЕ. ... 4 пґпµпєп°п±яЂяЏ 2008 пЕ. 3:18 520500 dipl_Centr_kom_1.jpg . 4 пґпµпєп°п±яЂяЏ 2008 пЕ. 3:18 1096024 dipl_Centr_kom_2.jpg . 24 пґпµпєп°п±яЂяЏ 2008 пЕ. ... 8:35 1379922 IMG_5631.JPG . ... 8:35 1575610 IMG_5636.JPG . ... 8:35 1183104 IMG_5655.JPG . ... 10:04 1446713 IMG_6093.JPG . ...

... Bad Astronomy . ... Bitesize Astronomy . ... Last week's Snack talked about how black holes can affect the environment around them in such a way as to be very bright . ... It's a common misconception that black holes always have matter swirling into them. ... As this matter gets closer and closer to the black hole it piles up and a large, fairly flat disk forms. This is called the accretion disk , because matter from this disk accretes (that is, falls in) on the black hole. ... 2008 Phil Plait. ...

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. ...