The ESA/ESO Astronomy Exercise Series 2 . The Distance to Messier 100 as Determined by Cepheid Variable Stars . ... The small variations in distance to the individual Cepheid variable stars in the Cloud are negligible compared with the much larger distance to the SMC. ... In this way Cepheid variable stars can be used as one of the 'standard candles' in the Universe that act either as distance indicators themselves or can be used to calibrate (or set the zero point for) other distance indicators. ...

... Filtre Astronomik UHC (Ultra High Contrast) (1.25") . Filtre Astronomik OxygГЕne III (OIII) (1.25") . Valeur neuf 100в'ѓ (actuellement sur Optique Unterlinden), VENDU -30% SOIT 70в'ѓ piГЕce . Polarisant variable Orion (1.25") . Valeur neuf 50в'ѓ (actuellement sur Optique Unterlinden), VENDU -30% SOIT 35в'ѓ . ... Remise en mains propres sur Perpignan ou envoi postal avec frais de port partagГї. ...

... Dept. for Physics of Stars&Galaxies . ... Using a database view Sloan Digital Sky Survey (SDSS), containing almost a million spectra created 15,000 sample galaxies with active star formation, which is used for various studies and physical state of evolution of galaxies. ... Star clusters of the Galaxy . The project MWSC (Milky Way Star Clusters) directory using 2MASS, which includes nearly 500 million vision to the limit Ks = 15.3, analyzed more than 4,000 cluster-like objects in the galaxy. ...

... The described algorithm is suitable for measurements of complex images of stars. ... a) the zero-based number of stars in the complex (multicentric) image, . b) set of preliminary coordinates - x i , y i , for all stars, index i is number of a star, . ... i - index of a star in the complex image; . ... These parameters are calculated by a nonlinear method of a least squares.The main output parameters of this algorithm are x i , y i ; where the index i is number of a star in the multicentric image. ...

... 0,50-0,59 (0,50-0,59) µm . ... Swath Width . ... at end of visibilty area . ... Visibility Area Width . ... Ground Resoultion in Nadir: . along swath . ... across swath . ... Ground Resolution at End of Visibilty Area: . ... 200 lines per second . ... at least 200 . Ground resolution corresponds to normal flihgt altitude 650 km. For more information send a mail to: info@sputnik.infospace.ru . ...

... MASTER Net is 56 square degrees per 1 exposition . ... 06 Dec 2015: GRB 151205B: MASTER-NET early optical observations GCN18665 . ... 18 Nov 2015: GRB 151118A: MASTER-NET optical observations GCN18613 . ... 12 Nov 2015: GRB 151112A: MASTER-NET optical limit GCN18591 . ... 07 Nov 2015: GRB 151107A: MASTER-NET optical observations GCN18565 . ... 31 Oct 2015: Five OTs detected by Global Robotic MASTER Net ATel8232 . ... 02 Oct 2015: GRB 151001B: MASTER-NET early optical observations GCN18380 . ...

ADC CATALOG HOLDINGS SHORT TITLE LIST March 29, 2002 (adapted from ftp://adc.gsfc.nasa.gov/pub/adc/archives/catalogs/key) Category 1: Astrometric and Positional Data - March 29, 2002 1090 Positions of 502 Stars in Pleiades Region (Eichhorn+ 1970) 1107A Washington Cat Visual Double Stars 1984.0 (Worley, Douglass 1984) 1131A SAO Star ...

... SIXA FM ACCEPTANCE TESTS . ... In accordance to plan of the Acceptance Tests for Flight Models which was agreed in March 2000 in Moscow, the Acceptance Test of SIXA FM was carried out between 28 August and 2 September at VTT Automation, Finland. ... GOUCH for electronics box of SIXA-FM, Remark: not updated after changes made in 1994. ... Ground Test Program of SIXA-FM. ... Integration Test of SIXA FM, BIUS, ISS, DSS, and MPMI . ... Test data were written to MPMI, DSS-F, DSS-S and GSE SIXA-FM, . ...

... Bad Astronomy . ... Mad Science . ... Universe Today . ... Keep Bad Astronomy close to your heart, and help make me filthy rich. ... type 1a supernovae seem most useful . ... This is a bright, massive star that explodes after fusing all the light elements in its core. ... That means we can calculate how far away it is. ... This is exactly what we are trying to do with these supernovae; look far enough away that any deviations from flatness of the Universe can be seen. ... Phil Plait . ...

. Figure 4. Correlation between ratio of peak fluxes of flare microwave bursts at 17 and 35 GHz (parameter S 17 /S 35 ) and spectral index of solar proton fluxes (parameter ? = lg (J 10 /J 100 ) . The rest is as in Fig. 1. The following events are marked by numbers: 16 - 12.06.1990, 30 - 20.02.1994, 31 - 20.10.1995, 49 - 02.04.2001, 59 - 26.12.2001, 60 - 20.02.2002, 75 - 11.04.2004, 81 - 20.01.2005.

... In electron-positron colliders, effect of the lattice modification by opposing bunch focusing on the equilibrium radiation emittance is important at high values of the space charge parameter, so one should correctly evaluate this dynamic radiation emittance of the weak beam, which may differ a lot from the nominal emittance, already in the linear beam-beam force model. ... The linearized beam-beam force is equivalent to focusing insertion in linear lattice of the collider. ...

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. ...

... Variable Star Observing . ... Thursday, Nov 13, 2014 at 8:00 PM . While taking deep-sky images or observing double stars through the eyepiece can be fulfilling, the universe is dynamic and constantly changing - never more obviously seen than with variable stars. ... Please join us for a pre-meeting dinner discussion at Changsho, 1712 Mass Ave, Cambridge, MA at 6:00pm before the meeting. ... Nov . ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...