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1. APOD: 2013 January 3 - Open Star Clusters M35 and NGC 2158
... 2013 January 3 . Open Star Clusters M35 and NGC 2158 . ... Explanation: Open clusters of stars can be near or far, young or old, and diffuse or compact. ... Bright blue stars frequently distinguish younger open clusters. ... NGC 2158 is four times more distant than M35 , over 10 times older, and much more compact with many more stars in roughly the same volume of space. NGC 2158's bright blue stars have self-destructed , leaving cluster light to be dominated by older and yellower stars. ...
[ Сохраненная копия ]  Ссылки http://www.sai.msu.su/apod/ap130103.html -- 5.4 Кб -- 03.02.2013
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2. M46 and M47: Star Clusters Young and Old
... Separated by about a degree on the sky, two nice examples are M46 (upper left) 5,400 light-years in the distance and M47 (lower right) only 1,600 light-years away toward the nautical constellation Puppis . Around 300 million years young M46 contains a few hundred stars in a region about 30 light-years across. ... The small, colorful patch of glowing gas in M46 is actually the planetary nebula NGC 2438 - the final phase in the life of a sun-like star billions of years old. ... NGC 602 and Beyond . ...
[ Сохраненная копия ]  Ссылки http://www.astronet.ru/db/xware/msg/apod/2012-04-03 -- 16.0 Кб -- 03.04.2012
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3. http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7B9A5B5658-6AD3-4C0D-A604-FA6912ED957C%7D
... Embedded within this view are 2,753 star clusters. The view is 61,600 light-years across and contains images of 117 million stars in the galaxy's disk. Bottom-Left] An enlargement of the boxed field in the top image reveals myriad stars and numerous open star clusters as bright blue knots. Hubble's bird's-eye view of M31 allowed astronomers to conduct a larger-than-ever sampling of star clusters that are all at the same distance from Earth, 2.5 million light-years. ...
[ Сохраненная копия ]  Ссылки http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7B9A5B5658-6AD3-4C0D-A604-FA6912ED957C%7D -- 6.2 Кб -- 10.04.2016
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4. Blue Straggler Stars
... BLUE STRAGGLER STARS are unusually hot and bright stars found in the cores of ancient star clusters known as globulars. ... BACKGROUND (from wikipedia): Blue straggler stars are stars in open or globular clusters that are hotter and bluer than other cluster stars having the same luminosity. ... There is evidence in favor of this view, notably that blue straggler stars appear to be much more common in dense regions of clusters, especially in the cores of globular clusters. ...
[ Сохраненная копия ]  Ссылки http://www.mso.anu.edu.au/~jerjen/researchprojects/bluestraggler/bluestraggler.html -- 9.1 Кб -- 02.10.2012
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5. The M87 Globular Cluster System Revisited
... We present V and I photometry for a sample of globular cluster candidates in the Virgo galaxy M87. ... A comparison with the color distribution of globular clusters in the Milky Way shows that M87 contains a large population of red clusters that is virtually absent in our Galaxy. ... Increasingly accurate measurements of the colors and metallicities of globular clusters in distant galaxies are beginning to shed new light on, and provoke new questions about, the origin of globular cluster systems. ...
[ Сохраненная копия ]  Ссылки http://www.stsci.edu/stsci/meetings/shst2/elsonr.html -- 15.8 Кб -- 12.04.2006
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6. ASP: Big Clusters, Tiny Galaxies
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. ...
[ Сохраненная копия ]  Ссылки http://www.astrosociety.org/pubs/mercury/32_03/clusters.html -- 17.5 Кб -- 20.04.2012
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7. http://www.arcetri.astro.it/~palla/ANDREAIMMAGINI/ViaLattea/9926.txt
... STScI-PRC99-26 HUBBLE IMAGES A SWARM OF ANCIENT STARS This stellar swarm is M80 (NGC 6093), one of the densest of the 147 known globular star clusters in the Milky Way galaxy. ... By analyzing the Wide Field and Planetary Camera 2 (WFPC2) images, including images taken through an ultraviolet filter, astronomers have found a large population of "blue stragglers" in the core of the cluster. These stars appear to be unusually young and more massive than the other stars in a globular cluster. ...
[ Сохраненная копия ]  Ссылки http://www.arcetri.astro.it/~palla/ANDREAIMMAGINI/ViaLattea/9926.txt -- 5.1 Кб -- 02.03.2001
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8. Armagh Observatory
... All previous such superstars have been found along with many companion stars in the centres of crowded star clusters. The star is known as VFTS 682 from the VLT-FLAMES Tarantula Survey catalogue of the European Southern Observatory's Very Large Telescope (VLT) located at Paranal in Chile by means of the attached FLAMES instrument. ... Although VFTS 682 seems to be alone now it is not very far away from a very rich star cluster known as RMC 136 that contains several similar superstars. ...
[ Сохраненная копия ]  Ссылки http://star.arm.ac.uk/press/2011/monster_star_pr2.html -- 9.1 Кб -- 25.05.2011
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9. NGC4666: Secrets of a Starburst Galaxy | Astronotes
Astronotes Armagh Planetarium's Stellar Blog! ... Stars . ... Starbursts are short-lived events, stars are forming so quickly that the reservoirs of interstellar gas from which stars are coalescing would be used up on a timescale much shorter than the age of the galaxy . ... Strong stellar winds from giant new stars in the starburst region combine with the blasts of supernovae to push a mighty flood of extremely hot gas, a ?superwind? from the galaxy thousands of light years into intergalactic space. ...
[ Сохраненная копия ]  Ссылки http://www.armaghplanet.com/blog/secrets-of-a-starburst-galaxy.html -- 42.5 Кб -- 09.04.2016
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10. http://www.eso.org/public/news/eso1519/kids/
... A few weeks ago, around a galaxy far, far away, a new type of mysterious БЂњdarkБЂќ star cluster was spotted. Our Galaxy, the Milky Way, is surrounded by about 150 groups of stars, which are called globular clusters. ... A galaxy called Centaurus A (sen-TOR-us Ay) is surrounded by thousands of globular clusters. ... These globular clusters aren't the only dark object in Centaurus A, at the centre of this galaxy lies a black hole that is 55 million times more massive than our Sun! ...
[ Сохраненная копия ]  Ссылки http://www.eso.org/public/news/eso1519/kids/ -- 10.4 Кб -- 11.04.2016
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11. The Pleiades
... The Pleiades star cluster, also known as the Seven Sisters and Messier 45, is a conspicuous object in the night sky with a prominent place in ancient mythology . ... The stars in the Pleiades are thought to have formed together around 100 million year