M1 image More About M1 Nice Color Picture . ... M16 image More About M16 HST image . ... M31 image More About M31 Nice Color Picture . ... M42 image ; M43 image More About M42/43 Nice Color CCD Picture . M51 image More About M51 Color Image of M51 M51 Supernova . M57 image More About M57 Nice Color CCD Picture Very Deep M57 Image . ... M81 image More About M81 M81 Supernova Ultraviolet Image of M81 More about Ultraviolet Imaging . M82 image More About M82 M82 False Color M82 True Color . ...

... 28.04.2015 . ... April . ... April 2015 . ... 2015 2016 . ... NASA Web Site Statements, Warnings, and Disclaimers . NASA Official: Jay Norris. ... A service of: LHEA at NASA / GSFC . ... Publications with keywords: spiral galaxy . Publications with words: spiral galaxy . ... Sculptor Galaxy NGC 134 . NGC 3310: A Starburst Spiral Galaxy . Hidden Galaxy IC 342 . ... Star Streams and the Whale Galaxy . In the Center of Spiral Galaxy NGC 3521 . Bright Spiral Galaxy M81 . ...

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2014 April 21 . Massive Nearby Spiral Galaxy NGC 2841 . ... A mere 46 million light-years distant, spiral galaxy NGC 2841 can be found in the northern constellation of Ursa Major . ... X-ray images suggest that resulting winds and stellar explosions create plumes of hot gas extending into a halo around NGC 2841 . ... About APOD | ...

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. December 18, 1999 . Irregular Galaxy Sextans A . ... Their newly formed, bright, blue star clusters found along beautiful, symmetric spiral arms are guaranteed to attract attention. But small irregular galaxies form stars too , like this lovely, gumdrop-shaped galaxy, Sextans A . ... About APOD > . ...

23rd of December 2014 . A dwarf galaxy behind the Magellanic Bridge . Author: B. Koribalski (CSIRO ATNF) . ... High resolution 21-cm HI observations towards the dSph galaxy were obtained with CSIRO's Australia Telescope Compact Array (ATCA; right image). No hydrogen gas (HI) is detected at the position of the dwarf galaxy, which lies behind the Magellanic Bridge. ... today * ATNF | ... ATCA | ...

... Star Atlas . ... solar system . ... stars . ... Observe the Solar System . ... What factors determine if a massive star (say, 100 solar masses) forms instead of a Sun-like star? ... Stars of all masses form from dense clumps within exceptionally cold molecular clouds. ... Massive stars tend to form at the centers of high-mass reservoirs of gas. Get instant access to subscriber content on Astronomy.com! ... A gamma-ray burst hints that LIGO's double black holes started as one massive star . ...

... Bojan Nikolic web pages (r. 329) . Galaxy Evolution . ... By comparing narrow band spectral line indices with recent models of simple stellar populations (SSPs) we investigate trends in the star formation history as a function of galaxy mass (velocity dispersion), density of environment and galactic radius. ... MJD of the SDSS observation of the galaxy . ... The history of star formation and mass assembly in early-type galaxies . ... Copyright 2005 -- 2016, Bojan Nikolic feedback welcome ...

Most of these images were obtained by Mike Bessell, Michelle Buxton, Hwankyung Sung, Ralph Sutherland and Bob Watson at SSO using a 2Kx2K Site CCD behind a Nikon or Hasselblad lens or directly on the 1m telescope. A few images are from the Hubble Space Telescope. Some of the M42 images were obtained with the KPNO 1m and ESO NTT telescope. One image is a mosaic of IRAS images. ... Details of the CCD imaging program at MSSSO. ... antenna.jpg (53KB) . ... ngc6744.jpg (59KB) . ...

... Staff Directory . ... Missions . ... Hubble Heritage Project . Future Missions and . ... Colloquia . ... Events . ... Youth for Astronomy and Engineering . ... Engineering Technology Colloquia . ... The goal of this mini-workshop was to consider the census, origin, and evolution of the most massive galaxies in stellar mass from early times to the present. ... Is there a "massive galaxies" problem at all? ... What is the relation, if any, between very dusty (star-forming) and very massive galaxies? ...

... Field of research: Extragalactic astronomy. ... NASA Astrophysics Data System (ADS) Abstract Service . ... CADC Home Page . ... CCD Images of Galaxies . ... RUSSIAN LINKS . ... UA Astronomy Personal Home Page - Bill Keel . ... The Shape of the Rotation Curves of Edge-on Galaxies, by A.V.Zasov and A.V.Khoperskov, 2003. ... A Thickness of Stellar Discs, by A.V.Zasov, and D.V.Bizyaev, 2003 . Minimum Velocity Dispersion in Stable Stellar Disks, by A.V.Khoperskov, A.V.Zasov, and N.V.Tyurina, 2003 . ...

... Massive stars, having 10-150 masses of the Sun, with metallicities Z tens to hundreds times less than that of the Sun (Zo), are the main regulators of the galaxy formation and evolution processes in the early Universe. ... In this galaxy, using the 6 m BTA telescope, a new massive blue variable star with high luminosity (>=10 5 Sun's luminocities in visible light) was found. As far as its properties are concerned, this star falls into an LBV (Luminous Blue Variable) class of stars. ...

Astronotes Armagh Planetarium's Stellar Blog! ... Our Galaxy . Milky Way . Stars . ... Other Galaxies . ... Barred spiral galaxy NGC 6744 is located in a constellation of the southern hemisphereтАЩs sky, called Pavo (Latin for peacock). At a distance from our Solar System of about 30 million light years, NGC 6744 is not only one of the closest spiral galaxies but is thought to be one of the visible galaxies most like our own Milky Way. Is it our cosmic doppelganger? ...

... Our Sun is part of a huge wheel-shaped collection of stars. ... Astronomers have long suspected it was a very massive black hole, and that every galaxy had such a central mass, created early in the history of the universe. ... However, unless that object happens to be headed directly at the black hole (a relatively small target) it will just swing around and fly away again, like a comet making a pass at the Sun. The velocity acquired in falling towards the black hole also helps it escape. ...

The very metal-poor local dwarf galaxies - the analogs of primordial galaxies in young Universe . ... The goal of this project is the study of the properties of the local eXtremely Metal-Deficient (XMD) dwarf galaxies. ... S.A. Pustilnik, J.-M. Martin . ... Pustilnik S.A. "Dark galaxies" and local very metal-poor gas-rich galaxies: possible interrelations, in: Dark Galaxies and Lost Baryons, Edited by J.Davies and M.Disney, Proceedings of IAU Symposium No. 244, held 25-30 June, 2007 in Cardiff, UK. ...

... In the picture it looks like a peaceful place, but astronomers have spotted the violent explosions of two stars in this galaxy over the past 30 years. The explosion of a massive star is called a supernova. ... The first supernova that was spotted in this galaxy was discovered by professional astronomers, using a big telescope that is based in the desert in the country Chile in South America. ... Any changes in the brightness of an area of the galaxy could mean that a star has exploded. ...

... In this talk, I will discuss a study of the effect of ionization on the low end of HI mass function. The existence of a large population of low mass galaxies follows from CDM theory. ... HIDEEP found no low HI column density galaxies. One possible explanation is that the disks are "frozen". ... We assume that galaxies are exposed to an ionizing background radiation, from a uniform quasar distribution. ... We find a gap in the average column densities around N H which drops to 10 17 cm -2 . ...

... Field of research: Extragalactic astronomy. ... NASA Astrophysics Data System (ADS) Abstract Service . ... CADC Home Page . ... CCD Images of Galaxies . ... RUSSIAN LINKS . ... UA Astronomy Personal Home Page - Bill Keel . ... The Shape of the Rotation Curves of Edge-on Galaxies, by A.V.Zasov and A.V.Khoperskov, 2003. ... A Thickness of Stellar Discs, by A.V.Zasov, and D.V.Bizyaev, 2003 . Minimum Velocity Dispersion in Stable Stellar Disks, by A.V.Khoperskov, A.V.Zasov, and N.V.Tyurina, 2003 . ...

... In the table given at a separate sheet enumerate in growing order (from 1 to 13) the size and the mass of each object: Milky Way Galaxy, Andromeda Galaxy, Neutron star, Electron, Mercury, The first satellite "Sputnik I", Venus, Pluto, Proton, Red dwarf, Black cat, White (Polar) bear, the Sun. ... Ashulia's coordinates are 23°53.6' N, 90°19.8' E. Draw pictures explaining your solution. ... The solution has to include an artistic picture with an image of the Bengal Tigerastronomer observing the star. ...

... Date : the picture was taken on December 14th 1998 . Location : Courroux / Ju (Switzerland) . Equipement : telescope Celestron Ultima 8 operating at F/D=6.3 camera CCD ST7 operating at high resolution autoguided mode . Exposures : 6 exposures of 10 minutes each . Pictures treatment : logarithmic . Software : Prism98 version 3.0 for acquisition and treatment of the pictures . ... 2822 Courroux . ... David Bishop Last modified: Wed Dec 16 13:55:05 EST 1998 ...

Next: Massive X-ray Binaries Up: No Title Previous: X-ray Galactic Sources and . Table  7 represents the full matrix of stages of binary stars in a model spiral galaxy with the total mass of matter in stars of for (flat spectrum), and Lyne and Lorimer's distribution for kick velocities (equation 7.4.2 )   with km s (which gives the transverse velocity distribution for modeled pulsars best-fitting Lyne and Lorimer (1994)[ 132 ] data; Figure  24 ). ...