... Total Magnitudes of Virgo Galaxies. ... An Investigation into the m p Scale of Volume I of Zwicky et al.'s . Catalog of Galaxies and Clusters of Galaxies . ... Contents Page: Volume 18, Number 2 . ... We investigate the photographic-magnitude ( m p ) scale of Volumeб I of the Catalog of Galaxies and Clusters of Galaxies for galaxies in the Virgo direction. ... Keywords: catalogues - galaxies: clusters: individual: Virgo - galaxies: fundamental parameters - galaxies: photometry . ...

The Doppler shift is the effect of sound increasing or decreasing in pitch as an object moves towards or away from you. ... Light works the same way, except light is shifted to redder colours when an object is moving away, and to blue colours when an object is travelling towards us. ... Almost every object he observed had its light stretched to redder colours, indicating essentially everything in the Universe was moving away from us. ... So the Hubble constant tells us how old the Universe is. ...

... This paper ( Burke et al. 2003 ) describes the creation of one such catalogue - the Southern Serendipitous High-redshift Archival ROSAT Cluster (SHARC) survey - which covers an area of 17.7 deg 2 and consists of 32 clusters with redshifts between 0.05 and 0.7 and X-ray luminosities between 7 x 10 42 and 4 x 10 44 erg/s: the high-redshift subsample contains 16 clusters with = 0.3 and X-ray luminosities greater than 2 x 10 43 erg/s (luminosities are quoted for the 0.5 - 2.0 keV energy band). ... 1997 ...

... A color image of the Andromeda galaxy always takes a little of my breath away: its golden yellow center, its bluish gossamer arms, its small, burr-like, fuzzy elliptical companion, M32. ... The beautiful images of Andromeda are a start; they give us a sense of what good form is for galaxies like our own. ... Meanwhile, radio astronomers have peered to the very center of the Galaxy and the hungry black hole there; the long radio wavelengths cut right through the dense underbrush of the Galactic...

... 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. ...

Supernova discovery statistics for 1999 . ... Sorted by Name For the year 1999 , 198 supernovae and 11 extragalactic novae were reported. 198 of these supernovae were named by CBAT, 0 were given possible supernova designations, and 0 were not reported to CBAT. 49 supernovae were found in NGC/IC galaxies, 84 were found in named galaxies 64 objects were discovered by amateurs 0 were brighter than 13th Magnitude 21 were brighter than 16th Magnitude 65 were brighter than 18th Magnitude 115 ...

... Cross-shaped galaxy ZGC 2315+03 (Fig.1) has been described by Zwicky (1971) as ``post-eruptive or the result of the crossing of a compact galaxy through an edge-on spiral'' . This object was included in the Polar-Ring Catalog (C-71) by Whitmore et al. (1990) as a possible candidate for Polar-Ring Galaxies (PRG). ... One of them is galaxy 'disk' and the other is 'polar-ring'. ... The facts against the polar-ring nature of ZGC 2315+03 can be summarized as follows: . ...

... Curriculum Vitae Observations and theory of star cluster formation 22) A.K.Dambis and Yu.N.Efremov Journal for History of Astronomy, 31, 115-134, 2000 Dating Ptolemy's star catalogue through proper motions: the Hypparchan epoch 23) B.G.Elmegreen, Yu.N.Efremov, S.Larsen Astrophys. J., 535, 748 - , 2000 A young globular cluster in the galaxy NGC 6946 24) Yu.N.Efremov. ... 28) Yu.N.Efremov. ... The location of star complexes in the Galaxy was studied in papers with E.Alfaro, L.Berdnikov and T.Sitnik. ...