... To help answer these questions, the largest and most mysterious moon of Saturn got a quick first look from the Cassini robot spacecraft soon after entering orbit around the giant planet last week. Cassini Images Density Waves in Saturns Rings . ... The Cassini spacecraft just entering orbit around Saturn has started sending back spectacular images of Saturn's immense ring system in unprecedented detail. ... M57: The Ring Nebula . ... Cassini to Venus . ... NGC 7331: A Galaxy So Inclined . ...

... Tonight's Sky . ... The Magazine . News . Observing . ... Magazine . ... Gravitational wave search provides insights into galaxy evolution and mergers . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Open cluster NGC 2818, spiral galaxy NGC 2964, and spiral galaxy NGC 2976 . ... Astronomy for Kids . ... October 2012 . ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ... Astronomy Magazine . ...

... 2015 October 15 . M16 and the Eagle Nebula . Image Credit Copyright : Jimmy Walker . Explanation: A star cluster around 2 million years young surrounded by natal clouds of dust and glowing gas, M16 is also known as The Eagle Nebula. ... Described as elephant trunks or Pillars of Creation , dense, dusty columns rising near the center are light-years in length but are gravitationally contracting to form stars . ... About APOD | ... NASA Official: Phillip Newman Specific rights apply . ...

Astronotes Armagh Planetarium's Stellar Blog! ... Our Galaxy . ... Other Galaxies . ... Space Flight . ... October . ... Posted on November 19, 2010 | 1 Comment Could HIP 13044 b be the strangest exoplanet yet found? ... Continue Reading.. ... 2 Comments Using the Hubble Space Telescope, astronomers have been looking ten thousand years into the future of the vast globular cluster Omega Centauri. ... Posted on October 4, 2010 | 1 Comment Gorgeous! ... Posted on September 27, 2010 | ...

... October 27, 1999 . In the Heart of the Tarantula Nebula . Credit: Gary Bernstein Megan Novicki ( U. Michigan ); . ... Explanation: In the heart of monstrous Tarantula Nebula lies one of the most unusual star clusters. ... The energetic light from these stars continually ionizes nebula gas, while their energetic particle wind blows bubbles and defines intricate filaments. ... In the heart of this heart is a central knot of stars that is so dense it was once thought to be a single star. ...

Photon Scattering: Basic Principle of Photon Scattering . Audio Narration is available . No Scattering: Photon Source and Detector . ... For optical photons, scattering goes as wavelength to the -4 power. In the case of blue photons compared to red photons, this means that blue photons are about 10 times more likely to get scattered than red photons. ... Watch the blue photons scatter away from the detector . ... Interstellar dust make stars appear redder than they really are . ...

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... Abstract . ... C. Kochanek, The Ohio State University Research Foundation . ... A Deep X-ray Survey of the Small Magellanic Cloud . ... X-Ray Sources in Starburst Galaxies . ... The Formation History of Andromeda's Extended Metal-Poor Halo . ... The Sloan Lens ACS Survey: Towards 100 New Strong Lenses . ... HST Observations of Astrophysically Important Visual Binaries . ... ACS Nearby Galaxy Survey . ... Observations of the dwarf system, DDO 078, are scheduled during the coming week. ... Past weeks:...

... 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 years ago, making them 1/50th the age of our sun, and they lie some 130 parsecs (425 light years ) away. ... Data for these stars are listed in a table below. ... Yes . ... WEBDA Pleiades cluster data . ... M45: The Pleiades Star Cluster (2007 November 18) ...

Four spacecraft: INTERBALL Tail probe (IB_TAIL), CLUSTER (ESA/NASA), POLAR(NASA/ISAS), GEOTAIL (NASA) are considered. ... FSP criteria | FSP ASCII file | ... FSP time intervals . ... Magnetic local time . Magnetic conjugations . ASCII files : . ... The mulisatellites conjugations : . The FSP3 time intervals : . The FSP polar diagram . Last modified 1 September 2000 . ... IKI RAN | SSC IKI RAN | ...