Astronomy Picture of the Day . Discovery s Dawn . ... On April 5, visitors to Kennedy Space Center saw these colorful clouds, twisting and drifting through dawn skies. ... NGC 602 and Beyond . ... Near the outskirts of the Small Magellanic Cloud, a satellite galaxy some 200 thousand light-years distant, lies 5 million year young star cluster NGC 602. ... Recorded on March 1, the night sky includes a nearly full Moon and bright planet Saturn seen through thin clouds near picture center. ... April . ...

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... 2014 October 8 . NGC 6823: Cloud Sculpting Star Cluster . ... Explanation: Star cluster NGC 6823 is slowly turning gas clouds into stars. ... Some outer parts of the cluster, visible in the featured image 's center as the stars and pillars of emission nebula NGC 6820 , contain even younger stars. ... Open star cluster NGC 6823 spans about 50 light years and lies about 6000 light years away toward the constellation of the Fox ( Vulpecula ). APOD Wall Calendar: Nebulas and Star Clusters . ...

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• APOD: June 20, 1997 - NGC1850: Star Cluster in the LMC
• APOD: 2000 July 29 - NGC1850: Star Cluster in the LMC
• APOD: 2010 April 9 - Discovery's Dawn

Spitzer Space Telescope mid-infrared spectroscopy has been obtained for 15 carbon-rich protoplanetary nebulae (PPNe) in the Large Magellanic Cloud (LMC) and for two other such stars in the Small Magellanic Cloud (SMC). Of these 17 PPNe, the unidentified 21 ѕ®m feature is strong in 7 spectra, weak in 2 spectra, and very weak or questionable in 4 spectra. ... The remaining two objects show typical carbon-rich PPNe spectra with no 21 ѕ®m features. ...

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• Black Holes in Globular Clusters
• STScI Preprint #1293
• Target Category and Target Description [Description]

... International Year of Astronomy in Ireland . ... Christmas Moon", painting by Miruna Popescu, Armagh Observatory, featured as " Lunar photo of the Day " and " Astronomy Sketch of the Day " on 25 December 2009. ... To mark the 400th anniversary of GalileoтАЩs first use of the telescope to observe the sky, 2009 has been celebrated worldwide as the International Year of Astronomy. Moon over Armagh - link to Astronomy Sketch of the Day on 25 December 2009 . ... Monday, 11 May 2009 23:54 . ...

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• Armagh Observatory
• Noctilucent Clouds in Northern Ireland, 12 July 2009 | International Year of
• Christmas Moon over Armagh | International Year of Astronomy in Ireland |

... ESO, the European Southern Observatory . ... ESO . ... Galaxy Clusters . ... Star Clusters . ... This image from the Wide Field Imager on the MPG/ESO 2.2-metre telescope at ESOтАЩs La Silla Observatory in Chile, shows the bright star cluster NGC 6520 and its neighbour, the strangely shaped dark cloud Barnard 86. This cosmic pair is set against millions of glowing stars from the brightest part of the Milky Way тАФ a region so dense with stars that barely any dark sky is seen across the picture. ...

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• The hidden fires of the Flame Nebula* | ESO
• The past, present and future appearances of the Refsdal supernova | ESO
• Panning across the star cluster NGC 6520 and the dark cloud Barnard 86 | ESO

... 2000 August 4 . M15: Dense Globular Star Cluster . ... In fact, only 40,000 light-years away in the constellation Pegasus, M15 is one of the most densely packed globular star clusters in our Milky Way Galaxy. This stunning Hubble Space Telescope image of M15 shows thousands of individual stars across the central 10 or so light-years of the cluster, also cataloged as NGC 7078. ... Globular star clusters harbor from a hundred thousand up to a million stars and roam the Milky Way halo. ...

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• Venus - Galileo
• APOD: May 22, 1996 - Star Cluster in the Rosette Nebula
• APOD: October 18, 1999 - NGC 3603: An Active Star Cluster

One of the goals of ALFALFA (the Arecibo Legacy Fast ALFA Survey) is that of verifying whether a significant population of optically faint, baryon rich, low mass systems exists. ... ALFALFA has easily detected the cloud VIRGOHI 21, reported by Davies et al. ... The clouds in the complex appear not to be gravitationally bound to one other, and may represent the remnant of an ancient episode of harassment. ... Davies, J., Minchin, R., Sabatini, S., van Driel, W., Baes, M. et al. ...

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• New Results Confirm Dark Galaxy Existence
• The Pleiades
• I-GALFA Reveals Dynamic Events in Our Galaxy

... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Astronomy for Kids . ... The Horsehead Nebula in Orion . ... Astronomy 101 . ... Astronomy Day . ... NASAт??s Hubble sees a horsehead of a different color . ... Looking like an apparition rising from whitecaps of interstellar foam, the iconic Horsehead Nebula has graced astronomy books ever since its discovery over a century ago. ... Only registered members of Astronomy.com are allowed to comment on this article. ...

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• Bright planets meet at dusk | Astronomy.com
• Colliding galaxy cluster unraveled | Astronomy.com
• Astronomy Magazine - Interactive Star Charts, Planets, Meteors, Comets,

... 11 Yellow-Green (78% transmission): Contrasts well with the red and blue characteristics of surface features on Jupiter and Saturn. ... 82A Light Blue (73% transmission): Useful on the Moon, Mars, Jupiter, and Saturn, this subtle pale blue filter enhances areas of low contrast while avoiding significant reduction of overall image brightness. ... Meade Series 4000 Photo-Visual Color Filters may be ordered individually or in the following sets: . ... Meade Series 4000 Broadband Nebular Filters . ...

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• Meade Series 4000 Color Filter Set #1
• LS 3.5" Color LCD Video Monitor
• Meade Series 4000 Color Filter Set #2

... Subject and Problems of Stellar Astronomy. ... Plane of Galaxy, Methods of Its Location Determination. ... Stars Distances. ... Other Methods of Stars Distances Determination. ... Tangential Velocities, Their Determination by Self-Motions. ... Determination of Solar Apex and Spatial Velocity by Radial and Spatial Velocities of Stars. ... Features of Orientation and Parameters of Peculiar Stellar Velocities Ellipsoid. ... General and Selective Light Absorption in Galaxy. ... Darc Clouds in Galaxy. ...

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• Extragalactic Astronomy

This page is devoted to information on Supernova 1999gi in NGC 3184 . ... Information on the original web pages for many of these images can be found on the Supernova links web page. ... NGC 3184 is a fairly close Mag 10.3 galaxy, only about half as distant as the Virgo cluster. ... Seiichi Yoshida has a 1999gi page . Odd Trondal's 1999gi page . ... CfA image . ... 14.5 . ... Jean Marie Llapasset image . ... vsnet-alert 3805 ] SN 1999gi in NGC 3184 . vsnet-chat 2438 ] Host galaxy of SN1999gi . ...

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• Supernova 2002bu in NGC 4242
• Supernova 1999cl in M88
• Supernova 2000dk in NGC 382

Uranus . ... Miranda . ... 1998 image from HST showing bright clouds html . ... Two views of Uranus' darkspot 107k gif ; 40k jpg . normal and false color views 102k gif ; 40k jpg . ... Infrared image of Uranus B 33k gif . Infrared image of Uranus 2 B 37k gif . Infrared image of Uranus 3 B 56k gif . ... Infrared image of Uranus 5 B 43k gif . Infrared image of Uranus 6 B 34k gif . Infrared image of Uranus 7 B 36k gif . ... Uranus' rings (false color) 78k gif ; 35k jpg ; 211k gif . ...

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• Jupiter's Moon Io
• Astronomical Names
• Titan Press Release

In this gallery are many images of Low Surface Brightness Galaxies which have recently been discovered and analyzed. ... The central surface brightness of this galaxy is 24.28 . Malin 2 This galaxy is another huge disk galaxy with a scale length of 15 kpc and a redshift of 15000 km/a. The high surface brightness knot in one of its spiral arms actually has the same color, luminosity and H-alpha equivalent width as the entire Large Magellanic Cloud . ... Truly it is a Low Surface Brightness Galaxy. ...

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• Astronomy HyperText Book: Stellar Clusters
• Astronomy HyperText Book: Interstellar Medium
• Astro-2 and the UIT Experiment

... Each IYA Discovery Guide includes: . ... The Night Sky Network is a nationwide coalition of amateur astronomy clubs bringing the science, technology, and inspiration of NASA's missions to the general public. ... The Night Sky Network's International Year of Astronomy (IYA) Discovery Guides are supported and sponsored by the NASA Forums and missions listed below: . Space Telescope Science Institute's Origins Education Forum . ... NASA Education Forum on the Structure and Evolution of the Universe . ...

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• ASP: Big Clusters, Tiny Galaxies
• ASP: Let Venus Be My Guide
• ASP: Star Science in the Autumn Sky

... MAO main . ... The DRAGON globular cluster simulations: a million stars, black holes and gravitational waves . ... simulations of globular clusters with a million stars on the high-performance . ... of stars in globular clusters at unprecedented detail but also shed light into . the dark world of black holes. ... clusters of single and binary black holes. ... of a globular cluster. www.mpa-garching.mpg.de/328833/hl201603 . ... MAO/NASU, 27 Akademika Zabolotnoho St. 03680 Kyiv, Ukraine . ...

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... The jets can also be produced in smaller scale by binary stellar systems. ... Some 200 -- 250 X-ray binaries, systems in which a neutron star or black hole is accreting material from a companion star, are known. Approximately 20% of these sources have been detected at radio wavelengths, and in several cases high resolution radio observations have resolved this emission into jet-like structures, sometimes with components moving at relativistic velocities. ... It is variable radio source. ...

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• Tclet for Cluster Database.
• DISCUSSION
• CCD photometry

Many intermediate-age star clusters in the Magellanic Clouds exhibit very unusual features in their colour-magnitude diagrams that suggest they may have formed their stars over periods spanning hundreds of millions of years per cluster. ... Nonetheless, this interpretation is enticing in the context of the formation of ancient globular clusters, which almost always exhibit puzzling abundance patterns that apparently require multiple episodes of star formation to explain. ...

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• http://www.mso.anu.edu.au/~bessell/thumbnails/images.txt
• Blue Straggler Stars
• C/2006 P1 (McNaught)

... Archives . ... ArXiv] SVM and galaxy morphological classification, Sept. 10, 2007 . ... On the Metallicity-Color Relations and Bimodal Color Distributions in Extragalactic Globular Cluster Systems by M. Cantiello and J. P. Blakeslee . Many observations on globular cluster systems (GCS) show bimodal distributions in color and metallicity space. ... Based on their simulation study, (V-H) and (V-K) are confirmed to be good colors for revealing unbiased bimodal metallicity distributions in GCS. ...

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• The AstroStat Slog globular cluster
• The AstroStat Slog Blog Archive [ArXiv] Numerical CMD analysis, Aug. 28th, 2007
• The AstroStat Slog Blog Archive my first AAS. IV. clustering

The 1000 Brightest HIPASS Galaxies: HI Properties . ... These belong to 91 new sources for which no optical or infrared counterparts have previously been cataloged, an additional 51 galaxies for which no redshifts were previously known, and 16 galaxies for which the cataloged optical velocities disagree. ... J0001-15, ( ps eps , jpg ) J0035-25, ( ps eps , jpg ) J0105-06, ( ps eps , jpg ) J0221-20, ( ps eps , jpg ) . ... The 1000 Brightest HIPASS Galaxies: Newly Cataloged Galaxies . ...

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• HIPASS Science meeting
• ATNF Science Highlights
• ATNF Colloquium

J/AstL/vol/page SAI Open Clusters Catalog (Glushkova+, 2009) ================================================================================ Automated search for star clusters in large multiband surveys. ... Color excesses E(B-V), distance moduli and ages were determined for 141 new and 27 known, but poorly studied clusters. We present the Sternberg Astronomical Institute Open Clusters Catalog (SAI OCL Catalog) of coordinates, diameters and main physical parameters of these clusters. ...

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• SAI OCL Catalog NGC 7788
• SAI OCL Catalog Koposov 12
• SAI OCL Catalog King 20