... Credit Copyright: Wil Milan Explanation: Galactic or open star clusters are relatively young. ... The striking red patch of glowing gas above center in this lovely photograph is the planetary nebula NGC 2438 - a brief, final phase in the life of a solar-type star a few billion years old whose central reservoir of hydrogen fuel has been exhausted. ... Publications with keywords: star cluster - M 46 - NGC 2438 - M 4 - planetary nebula . ... M46 and M47: Star Clusters Young and Old . ...

... 2000, ApJ, 537, L49 . ... F. Palla . Invited Talk at the IAU Symposium 200 "The formation of binary stars" eds. R.D. Mathieu and H. Zinnecker (ASP Conf. Ser.) in press . Optical follow-up of ROSAT discovered candidate members of the open cluster Coma Berenices . ... 2000, A , in press . ... 2000, ApJ, in press . ... 2000, ApJ, in press (Sept. ... 2000, ApJ Lett., in press . ... Click to examine publications from other years . ... Star Formation Group . ... Arcetri Home Page . ...

... 2015 April 17 . M46 Plus Two . ... Explanation: Galactic or open star clusters are young. ... In this pretty starscape, the colorful, circular patch above and right of the center of M46 is the planetary nebula NGC 2438. ... NGC 2438 is estimated to be only 3,000 light-years distant, though, and moves at a different speed than M46 cluster members. Along with its fainter cohort, planetary nebula NGC 2438 is likely only by chance appearing near our line-of-sight to the young stars of M46. ...

home publications > mercury . ... Big Clusters, Tiny Galaxies . ... Astronomers struggle to understand why giant star clusters form in the tiniest of galaxies . ... These clusters are probably young versions of globular clusters, but they are commonly called super star clusters. Seven dwarf galaxies within 16 million light-years have formed super star clusters, with one of these galaxies, NGC 1569, possessing two young clusters. ... Super star clusters have a lot to tell us about star formation. ...

Stellar Clusters are very useful laboratories for empirically studying stellar evolution. ... All cluster stars are at the same distance . All cluster stars have the same physical age . ... CM diagram Young Cluster In this case we see the Main Sequence fully represented. The blue dots represent massive stars with short main sequence lifetimes. ... Thus, identifying the most massive star which is still on the main sequence is an effective means of determining the age of a stellar cluster. ...

... Science . ... Science Users Information > Science Activities > PhD Thesis Topics offered by ESO Faculty Members . ... Science Users Information . ... Data Handling and Products . ... Science Data Products Forum . ... ESO Data . ... ESO Data Access Policy . ... ESO Science Newsletter . ... ESO astronomers often are working on scientific programmes and data sets that are suited for PhD theses. This page gives an overview over what is currently offered by Faculty astronomers. ... Thesis topic . ...

... HST Phase II Proposal Instructions for Cycle 20 > Chapter 3: Fixed and Generic Targets > 3.3 Target Category and Target Description [Description] . ... Each target must be assigned a single primary category from Table 3.2 , and at least one descriptive keyword , chosen from the appropriate Table 3.3 through Table 3.9 (see Table 3.2 for which table is appropriate for each category). ... Table 3.3: Descriptive Keywords for STAR and EXT-STAR . ... Table 3.6: Descriptive Keywords for CLUSTER OF GALAXIES...

... Last updated 10 October 2014 . ... Dr. Alasdair Dougal Mackey . ... Australian National University . ... 2004 - Ph.D., Institute of Astronomy and Trinity College, University of Cambridge . ... 2003-2006 - PPARC Postdoctoral Fellow, Institute of Astronomy, University of Cambridge . ... 2005 - Lecturer for Globular clusters and globular cluster systems (8 lectures), a course for first and second year Ph.D. б б б б б б б б б б б б б  students, Institute of Astronomy, University of Cambridge . ...

... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Globular cluster NGC 2808, elliptical galaxy NGC 2986, and the Sextans Dwarf . ... A trio of open clusters in Cygnus, planetary nebula NGC 7139, and elliptical galaxy NGC 7103 . September 3 10, 2015: A trio of open clusters in Cygnus offers small-telescope owners a nice view, while large-telescope owners can seek out planetary nebula NGC 7139 in Cepheus and elliptical galaxy NGC 7103 in Capricornus. ...

... Structure of Data . ... Catalog . ... In SAI OCL Catalog, we introduce our work on investigation of the Milky Way system of open star clusters. The main goal of our study is a search for new clusters using huge surveys. 168 new clusters have been already discovered by us using J,H,Ks data from 2MASS point source catalog. ... For 141 new clusters, we found their physical parameters using J,H,Ks data from 2MASS catalog and, for a number of clusters, our UBVRI CCD observational magnitudes. ...

Astronotes Armagh Planetarium's Stellar Blog! ... Milky Way . Stars . ... This dramatic image depicts Omega Centauri, one of 200 or so globular clusters orbiting our Milky Way galaxy. ... Swarms of tightly packed stars, numbering in the thousands to low millions, globular clusters are cosmic fossils, relics of the early times of our galaxy. Omega Centauri may actually be the core of a smaller galaxy ripped apart and assimilated by our own Milky Way in the distant past. ...

Stellarium 0.12.3 . ... Classes . ... Renderer . FileљStructure . ClassљList . ClassљIndex . ... Ring Class Reference . Ring (double radiusMin, double radiusMax, const QString &texname) . ... draw ( StelProjectorP projector, class StelRenderer *renderer, StelProjector::ModelViewTranformP transform, class StelGLSLShader *shader, double screenSz, ShadowPlanetShaderInfo *info) . Draw the ring. ... void Ring::draw . ... Used to determine whether we're above or below the ring. shader . ...

... Home Gallery Astrophotography Deep Sky Images by Joe DiNapoli . ... Deep Sky Images by Joe DiNapoli . ... Deep Sky Gallery by Ed Fox . ... Beyond New York City . ... Observing Resources for Amateur Astronomers - Part 1: Beginning Observers . Observing Resources for Amateur Astronomers - Part 2: Intermediate Observers . ... A History of the First Forty Years of the Amateur Astronomers Association . ... 2016 Amateur Astronomers Association of New York Designed by Press Customizr Powered by . ...

A Canadian and American team of Astronomers have used the 305-m wide Arecibo radio dish, the world's largest and most sensitive radio telescope, to uncover a dozen new super-fast-spinning pulsars. The team directed their search for these rare and exotic stars by pointing the Arecibo radio telescope towards massive star clusters, called Globular Clusters, orbiting our Milky Way galaxy. ... One of the most exotic residents in the Globular cluster system are the millisecond pulsars. ...

... Home page * Postdoc Ads * Proposal Publications Team Working Groups Meetings PHISCC Workshops Computing 3D Visualisation - wikis - WALLABY wiki ASKAP wiki - more - ASKAP ASKAP News ASKAP Computing - surveys - HIPASS . ... the galaxy M81 ( THINGS) . B?rbel Koribalski (CSIRO ATNF) - main interests: structure dynamics of galaxies, star formation in galaxies, galaxy evolution . ... Nadya Ben Bekhti (AIfA) * Nearby galaxies, HVCs, HI absorption . Frank Bigiel (Heidelberg) * galaxies, xxx . ...

IFP gallery SCORPIO (since 2000). Here some data observed on the 6m telescope with IFP installed in the SCORPIO focal reducer are presented. ... Velocity field . Mkn 1157 was observed 1 Sep. 2002 in the Ha emission line. Texp =32x240 sec, seeing 1.5", IFP260. ... This galaxy was observed September, 23 2000 in the Ha emission line, Texp=32x120 sec, seeing 2.5", IFP260. ... PV Cep was observed at the 6m telescope in May, 25 2003 in the [SII] 6716A with IFP501, Texp=36x200 sec, seeing 1.0". ...

ABSOLUTE PROPER MOTIONS OF 331 OPEN CLUSTERS . ... The proper motions of stars in the fields of 331 open clusters were taken from Four-Million Star Catalog (4M-catalog) of positions and proper motions (Volchkov et al. ... The absolute proper motions for 21 young open clusters have been derived by comparison of precise relative proper motions of individual stars and their corresponding absolute proper motions. ... Sign of proper motions in RA . ... 0.0001 arcsec/yr . ... rms error in RA proper motion . ...

BV (RI)KC CCD photometry of the core of the young open cluster, NGC5460 D. Barrado and P.B. Byrne We present CCD photometry on the BV(RI)KC (Cape) photometric system of the core of the young open cluster, NGC5460, to a magnitude limit V ъ 19, R ъ 19.5. We give photometry for 353 stars 1 and identify 25 as cluster members along with a further 27 as possible members based on their positions in individual colour­magnitude diagrams. ...

... Bad Astronomy . ... Bitesize Astronomy . ... Have you ever looked at pictures of Saturn's rings and noticed what look like gaps in the rings? ... Gian Domenico Cassini discovered a large gap in Saturn's rings in 1675. Later, an astronomer named Encke discovered a smaller gap near the edge of the rings. ... It was found long ago that an orbit in the Cassini Division, as the large gap is named, has a period almost exactly one-half that of one of Saturn's moons named Mimas. ... 2008 Phil Plait. ...

... We have made observations of the Perseus cluster with the Westerbork Telescope at 610 MHz. ... Several newly detected sources are identified with cluster galaxies. ... No evidence is found for the existence of the previously reported ~ 65'x25' cluster halo, 3C 84B. Key words: radio galaxies - clusters - tailed radio sources buoyancy The Perseus Cluster of galaxies is one of the most fascinating systems accessible to extragalactic astronomers. ...