... 2002 July 30 . A Star Cluster in Motion . ... Explanation: Star clusters are a swarm of complex motions. The stars that compose globular clusters and many open clusters all orbit the cluster center, occasionally interacting, gravitationally, with a close-passing star. ... Cluster stars frequently fall more directly toward the center and many times trace out unusual and complex loops . The vast space inside a cluster results in stars colliding only rarely. ... About APOD | ...

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• APOD: 2010 June 20 - Abell 2218: A Galaxy Cluster Lens
• APOD: 2009 September 21 - Abell 370: Galaxy Cluster Gravitational Lens
• APOD: 2004 August 7 - Giant Cluster Bends, Breaks Images

... May 3, 1997 . Giant Cluster Bends, Breaks Galaxy Images . ... Explanation : What are those strange blue objects? Many are images of a single, unusual, beaded, blue, ring-like galaxy which just happens to line-up behind a giant cluster of galaxies. ... The distinctive shape of this background galaxy -- which is probably just forming -- has allowed astronomers to deduce that it has separate images at 4, 8, 9 and 10 o'clock, from the center of the cluster. ... About APOD > . ...

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• APOD: December 13, 1997 - The Coma Cluster of Galaxies
• APOD: 2000 January 4 - Galaxies Cluster Toward the Great Attractor
• APOD: 2001 March 11 - NGC 1818: A Young Globular Cluster

... Credit: Stefan Seip Explanation: Sweeping northward in planet Earth's sky, comet Machholz extended its long ion tail with the Pleiades star cluster in the background on January 7th. ... January . ... Publications with keywords: Comet Machholz - pleiades - comet - star cluster - comet tail - M45 . Publications with words: Comet Machholz - pleiades - comet - star cluster - comet tail - M45 . ... Comet Holmes Over Hungary . ... M45: The Pleiades Star Cluster . ... Comet Holmes Coma Expands . ...

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• Abell 370: Galaxy Cluster Gravitational Lens
• Астронет > Machholz Meets the Pleiades
• Abell 2744: Pandoras Cluster of Galaxies

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. ...

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... Archives . ... my first AAS. ... I was questioned by two attendees, acquainted before the AAS, if I can suggest them clustering methods relevant to their projects. ... classification vs. clustering or supervised learning vs. unsupervised learning : the former terms from the pairs indicate the fact that the scientist already knows types of objects in his hands. ... Tags: Classification , clustering , cosmology , spatial statistics , supervised learning , test , unsupervised learning . ...

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• The AstroStat Slog clustering
• The AstroStat Slog Blog Archive Classification and Clustering
• The AstroStat Slog outliers

... Главная . ... Новости . ... Проекты . Любителям астрономии . Проект ISON . ... Подробнее . ... Категория: Новости проекта ISON . ... Метки: Космический мусор ,љ Астероиды ,љ Гамма-всплески ,љ Любителям астрономии ,љ Кометы љ . ... Метки: Космический мусор ,љ Астероиды ,љ Любителям астрономии љ . ... Новости обсерваторий проекта] - Обсерватория Кубанского государственного университета от Иванов А - 09.04.2016 11:08:49 . ... 1999-2013 Copyright "Астрономия и Телескопостроение" . ...

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... ATNF Home . About ATNF . ... About ATNF overview . ... Australia Telescope Steering Committee . ... Australia Telescope User Committee . ... Astrophysics graduate student programs . ... Australian Square Kilometre Array Pathfinder . Murchison Radio-astronomy Observatory . ... Parkes radio telescope . Australia Telescope Compact Array . Mopra radio telescope . ... Visiting Parkes radio telescope . Visiting Australia Telescope Compact Array . ... Parkes radio telescope webcam . ...

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• A Statistical Comparison of Line Strength Variations in Coma and Cluster
• Radio Images of the Globular Cluster 47 Tucanae
• Blind HI Survey in the Centaurus and Fornax Clusters

An Ancient Universe: How Astronomers Know the Vast Scale of Cosmic Time . THE CHANGING UNIVERSE: EVOLUTION HAPPENS! . b) Changes in Stars . One of the great discoveries of modern science is that stars (like people) live only a measurable life-time and then die. Although the lives of the stars are enormously longer than the span of a human life, we can learn about the life story of the stars by studying them at many different stages in their life cycle, from birth to death. ...

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• ASP: Steering by Different Stars? Astronomers and the Dark-Sky Movement

Next: J.E. Chambers, Research Astronomer Up: Research Previous: Research Contents . ... Solar Variability and Climate . Other Activities . ... Applied to data of flares on Gliese866 he was able to estimate the area of hydrogen emitting flare regions as 1-13% of the stellar surface. ... As partners in the project, Armagh Observatory has been asked to contribute to the selection process in exchange for priority access to the data which will eventually flow from the satellite. ...

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• Taurid Complex
• SELB Schools Cluster Programme Show | International Year of Astronomy - Beyond
• SELB Schools Cluster Programme Show | OASES Over us All is the SElfsame Sky |

Brad Whitmore 2/21/06 NVO Study of Super Star Clusters in Nearby Galaxies ­ Proposal and Demo B . ... NVO tools used) DataScope ­ Get SDSS g-band image WESIX - Source extraction and cross matching ALADIN ­ Visualization Voplot ­ Analysis Formation of Cluster 6 Brad Whitmore 2/21/06 Photometric Calibration Compared SDSS g-mag from sextractor to HST V-mag (Rupali Chandar) Scatter ~ 0.1mag Analysis with VOplot Source classification with flux concentration index (aperture mag ...

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• Andy Fruchter's Homepage
• Gregory F Snyder
• Practical Validation of Results

Next: Model of clusters Up: paper2 Previous: paper2 . ... It allows estimating different microphysical properties of scatterers (size, complex refractive index, shape, etc.) from measured characteristics of the scattered radiation. ... The complexity of the direct problem depends on its input parameters characterizing the shape, size and structure of the scattering particle. ... Next: Model of clusters Up: paper2 Previous: paper2 root 2003-04-11 ...

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• Model of clusters

The record of baryon acoustic oscillations (white circles) in galaxy maps helps astronomers retrace the history of the expanding universe. These schematic images show the universe at three different times. ... These variations included the signal of the original baryon acoustic oscillations (white circle, right). As the universe has expanded (middle and left), evidence of the baryon oscillations has remained, visible in a "peak separation" between galaxies (the larger white circles). ...