... 2016 February 5 . Massive Stars in NGC 6357 . ... Explanation: Massive stars lie within NGC 6357 , an expansive emission nebula complex some 6,500 light-years away toward the tail of the constellation Scorpius . In fact, positioned near center in this ground-based close-up of NGC 6357, star cluster Pismis 24 includes some of the most massive stars known in the galaxy, stars with nearly 100 times the mass of the Sun. ... About APOD | ... NASA Official: Phillip Newman Specific rights apply . ...

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• APOD: 2007 February 22 - Mystery Over Australia
• APOD: 2014 February 3 - Lunar Time Lapse Panorama including Yutu Rover
• APOD: 2014 February 1 - NGC 6188 and NGC 6164

... X-ray: ESA/XMM-Newton /EPIC/XMM-Newton-SOC/Boulanger Explanation: In 1995, a now famous picture from the Hubble Space Telescope featured Pillars of Creation, star forming columns of cold gas and dust light-years long inside M16, the Eagle Nebula . ... Toward the other extreme of the electromagnetic spectrum , XMM-Newton's X-ray vision reveals the massive, hot stars of the nebula's embedded star cluster. ... NASA Web Site Statements, Warnings, and Disclaimers . ... The Fairy of Eagle Nebula . ...

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... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2000 February 28 . The Sombrero Galaxy from VLT . ... FORS1 , VLT ANTU , ESO . ... Reasons include the Sombrero 's unusually large and extended central bulge of stars, and dark prominent dust lanes that appear in a disk that we see nearly edge-on. Billions of old stars cause the diffuse glow of the extended central bulge. ... About APOD | ...

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• APOD: February 7, 1998 - COBE Hotspots: The Oldest Structures Known
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... Star Atlas . ... stars . ... 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 . ... Get to Know the Night Sky . ... Astronomers know the fate of Sun-like and massive stars, but what about the majority of stars т?? the M-class red dwarfs? Will they also become giants or just flicker out? ... RELATED TOPICS: STARS . ... Get instant access to subscriber content on Astronomy.com! ...

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• Problems posed by massive stars | Astronomy.com
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• If a supernovaт??s original star is massive enough to form a black hole, why is

... These Frontier Fields will combine the power of HST with the natural gravitational telescopes of high-magnification clusters of galaxies. ... We are soliciting gravitational lensing maps for the last four Hubble Frontier Fields clusters (MACSJ0717.5+3745, MACSJ1149.5+2223, AbellS1063, and Abell 370) based upon the exceptionally deep HST FF imaging and other new ancillary data. ... For the full set of proposal instructions and requirements, see the FY16 Frontier Fields Lensing Map Call for Proposals....

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. My astronomical research interests center on galaxy structure and evolution. Current topics include: . Polar-ring and interacting galaxies (see also new catalogue ) . Galaxy warps: statistics, properties and origin . Spiral galaxies at z~1: radial and vertical structure of stellar disks, statistics of interactions . Surface photometry and kinematics, dynamical modeling . Observational cosmology . Joomla Counter since Sep 1997

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• The 2175? feature

... Science . ... Science Users Information > Science and Technical Meetings > Conferences 2011 > Very Low Mass Stars and Brown Dwarfs . ... Observing Facilities . ... Observing with ESO Telescopes . ... ESO Data . ... This workshop will review the current progress in our understanding of low mass star and brown dwarf formation in nearby molecular clouds, and will bring together observers and theoreticians to promote an energizing discussion. ... Surveys for young very low mass stars and brown dwarfs . ...

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... This is one of the results from the Arecibo Methanol Maser Galactic Plane Survey that is being presented by graduate student Jagadheep D. Pandian of Cornell University, Ithaca, New York, Dr. Paul F. Goldsmith of Jet Propulsion Laboratory, Pasadena, California and Dr. Avinash A. Deshpande of Raman Research Institute, Bangalore, India to the American Astronomical Society meeting in Washington DC. ... Methanol masers at 6.7 GHz are beacons of massive star formation in our Galaxy. ...

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13th of February 2015 . The Atlas3D view of massive galaxies with deep optical images . ... In a recent paper, Duc et al. (2015; including ATNF's Paolo Serra) present the result of a large observational campaign to study the faint outskirts of early-type galaxies as part of the Atlas3D project. These spectacular images reveal a large number of new features invisible in previous images, such as blue star-forming spiral arms, shells and a large diversity of tidal tails. ... today * ATNF | ...

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• Release of 22 Feb 1996
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Next: C.S. Jeffery, Research Astronomer Up: Research Previous: J.E. Chambers, Research Astronomer Contents . ... We examine spectral time-series of two lower-chromospheric lines observed with SUMER/SOHO (N I and C II ). ... Two examples of explosive events observed with SUMER/SOHO in transition region spectral lines are reported here; one detected in C IV 1548?, in a region within the northern polar coronal hole, and the other in O VI 1032?, in an active region. ...

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Next: The Evolutionary Status of Up: No Title Previous: Massive X-ray Binaries . After 25 years of pulsar studies, a radiopulsar has been discovered in a binary system with a massive optical companion (Johnston et al. ... As shown in the very first calculations of joint evolution of NS and normal stars in binaries (Kornilov and Lipunov, 1983b[ 86 ]) a considerable fraction (maybe, the majority) of NS in binary systems having an optical companion must be at the ejector љ (E) state. ... Systems . ...

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• Introduction
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... Development of Ideas of Structure and Evolution of Stars. Integral Features of Stars, Which Determine Their Structure, Direction and Rate of Evolutuion. ... Connection between Potential and Thermal Energy of Star. ... Structure of a Main Sequence Star. Features of Massive Stars Evolution on the Main Sequence. Internal Structure of the Sun. ... White Dwarfs, Their Features. ... Evolution from the Main Sequence of Massive Stars. ... Evolution of Small Mass Stars till White Dwarfs Sequence. ...

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We hosted an interdisciplinary two-day workshop on Solar Astronomy and Statistical inference at the CfA on Feb 16-17, 2012. ... Format: On the first day of the workshop, we had two tutorial sessions, one describing solar data for statisticians and the other describing statistics methods for astronomers. ... Presentation slides and video recordings are available via SIP (see links in session schedule details below). ... Video [.mov] (@SIP) . ... Massive solar data streams -- Alisdair Davey (CfA) . ...

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National Aeronautics and Space Administration . ... Bruce McCandless II (Captain, USN, Ret.) NASA Astronaut (former) . ... He was a member of the astronaut support crew for the Apollo 14 mission and was backup pilot for the first manned Skylab mission (SL-1/SL-2). ... A veteran of two space flights, McCandless has logged over 312 hours in space, including 4 hours of MMU flight time. ... With the completion of this flight McCandless logged 191 hours in space (including 4 hours of MMU flight time). ...

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... Monitor and Command Language . Data Structures . ... Data Exchange Format . Fitting of Data . Command Summary . ... CCD Reductions . ... Crowded Field Photometry . Long-Slit and 1D Spectra . Echelle Spectra . ... Test Data . Multivariate Analysis Methods . ... Time Series Analysis . PEPSYS general photometry package . ... The Data Organizer . ... Echelle Reduction . ... IRSPEC REDUCTION . Reduction of Long Slit and 1D Spectra . ... File Formats Required for Photometry . ...

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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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You might wonder how a black hole could be found if nothing including light can escape from it. ... HDE 226868 is a massive blue supergiant star; its companion is believed to be a black hole, surrounded by an accretion disc of gases from HDE 226868 which are spiraling into the black hole. ... Three other objects -- LMC X-3 in the Large Magellanic Cloud galaxy, and A0620-00 and V404 Cygni in our galaxy -- are also believed to have black holes as one of their components. ...

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... 333/2 including HTML versions of articles . ... 332/3 including HTML versions of articles . ... 331/3 including HTML versions of articles . ... 330/3 including HTML versions of articles . ... December 1997 . ... November 1997 . ... Indexed/abstracted in Astronomy and Astrophysics Abstracts, CAS, Current Contents, INIS, Inspec, Physics Abstracts, Physics Briefs, PHYS on STN, Science Citation Index, Technical Information Center/Energinfo, and Zentralblatt f r Mathematik . ... helpdesk@link.springer.de...

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The Russian Parliament will soon consider a bill that would restructure the Russian space program, 35 years after the launch оf Sputnik. ... But the legislation's most striking and controversial feature is a provision that would ban testing and deployment оf space weapons ? including anti-satellite weapons and space-based missile interceptors. ... A draft bill was written by a group of experts within the Moscow Space Club, several of whom now work on space issues with the Russian Parliament. ...

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... Using this model, I will show how AGN feedback affects the evolution of massive galaxies, causing them to become less massive, smaller, and redder. In addition, several observed relationships, including cosmic star formation rate density, galaxy luminosity function, and [alpha/Fe]-mass, can only begin to be reproduced when it is included. Finally, I will show how the enrichment history of massive galaxies and the IGM may be influenced by AGN feedback. ...

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• Paul Francis' Web Page
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