... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... post-merger model for a He+He white dwarf binary. The dashed lines show the evolutionary track during accretion and the solid lines show the post-merger evolution. ... The cross symbols show the R CrB stars from Jeffery et al. (2011), the circle symbols shows the EHe stars from Jeffery et al. (2011) and the dots show the He sdO stars from Hirsch (2009). ...

... General information . ... Staff . Research staff . ... Information . ... Historical highlights . Historical research . ... This process is thought to occur in circumstellar disks of gas and dust around young stars on rather short timescales : infrared surveys show that the number of low mass stars with disks drops dramatically for stars older than 10 Myr, suggesting that in order to form large solids before the disk disperses, the growth process has to take place within a few million years. ...

... The observed isotropy on the sky and non-uniform spatial distribution of gamma-ray bursts   (GRB) revealed by the BATSE   device onboard the Compton Gamma-Ray Observatory (e.g. Meegan et al. , 1992)[ 138 ] lend support to the idea of a cosmological origin of GRB (Prilutski and Usov, 1975;[ 165 ] Usov and Chibisov, 1975)[ 199 ] for which the best candidates could be merging binary NS+NS   or NS+BH   at high redshifts (z 1 -2), (Blinnikov et al. ... Calculation of Binary Neutron Star Coalescence Rates...

... The NSFnet backbone supports Internet connectivity to this site and hopefully the delivery of real data in quasi-real time demonstrates the power of the Internet today. ... Last Images of Comet prior to first Impact . ... Fragment A . KPNO Image taken near Fragment B Impact time . ... Well besides weighing a lot and being cold all the time, here is some animation to show you what the impact events might look like if you were riding one of the fragments . ...

... Galaxy Evolution home . ... The origin and evolution of radio sources . Radio sources and their environments . ... We are investigating how this interaction effects galaxy evolution in general as well as the feedback effect of the radio source on its host galaxy and AGN. ... One direct observational manifestation of this interaction is the existence of extended regions of emission-line gas which show a clear spatial relationship to the radio source itself. ...

... Australia Telescope Steering Committee . ... Parkes radio telescope . ... Late Stages of Stellar Evolution . Welcome to the home page of the Late Stages of Stellar Evolution" We are a research group which operates within the Astrophysics Group of the Australia Telescope National Facility. ... To investigate the late stages of stellar evolution and in particular the role of stellar mass-loss in the evolution of asymptotic giant branch stars, proto-planetary nebulae and extremely massive stars. ...

Astronotes Armagh Planetarium's Stellar Blog! ... Comets and Asteroids . ... Space Flight . ... Science Fiction . UFOs and Fringe Science . ... This close-up look at Comet ISON (C/2012 S1) is from NASAтАЩs Hubble Space Telescope. This image was captured on 10 April 2013, when the comet was at a distance of 386 million miles (slightly further than Jupiter) from the Sun. ... Image credit: NASA, ESA, J.-Y. Li (Planetary Science Institute), and the Hubble Comet ISON Imaging Science Team) . ...

... Club By-laws . ... Other Club Activities . ... Public Nights . ... Dr. James Green, NASA, Director Planetary Science will be our esteemed speaker on Tuesday, April 12, 2016 at 7:30 PM in Peyton Hall on the Princeton University campus. ... Our astronomers setup telescopes for public use at Communiversity in Princeton, Super Science Saturday at the NJ State Museum in Trenton and at various public events around Mercer County. ... Amateur Astronomers Association of Princeton, Inc., ...

... Tonight's Sky . ... The Magazine . ... Observing . ... Gravitational wave search provides insights into galaxy evolution and mergers . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Astronomy for Kids . ... Cosmic Adventures . ... Cosmic evolution in a computer . ... V irgo Consortium astrophysicists used a 25-terabyte databank to create a computer simulation showing cosmic structure's evolution. ... Get instant access to subscriber content on Astronomy.com...

... The analysis shows, that asteroid ­ rubble pile loses its fast fragments in no time but the retaining fragments forms a compact structure immersed in dust ­ gas atmosphere, created by interaction of interplanetary medium with dispersed product of collisional evolution of asteroid. By interaction of an asteroid ­ rubble pile with interplanetary medium structures asteroid can increase its brightness on account of blowed up dust simulating phenomenon of distant comet's brightening. ...

... Authors: Linda J. Smith 1 2 , Antonella Nota 1 3 , Anna Pasquali 1 , Claus Leitherer 1 , Mark Clampin 1 , Paul A. Crowther 4 We present new HST/FOS and ground-based long slit spectroscopic observations of the nebulae around the two LMC Luminous Blue Variables R127 (= HDE269858) and R143 (= HDE269929), and the Ofpe/WN9 star S119 (= HDE269687). ... We find that the circumstellar environment of R127 is complex and suggestive of two discrete ejections in the mass loss history of the central star. ...

... The remote planet Pluto and its moon Charon orbit the Sun at a mean distance of almost 6,000 million kilometres, or nearly fourty times farther out than the Earth. During a recent investigation by an international group of astronomers [1], the best picture ever of Pluto and Charon [2] was secured with the European Space Agency's Faint Object Camera at the Hubble Space Telescope (HST). ... The new HST image was taken when Charon was near its maximum elongation from Pluto (0.9 arcseconds). ...

STEP INTO THE BLUE - MEADE INSTRUMENTS PRODUCT GUIDE . ... Telescopes . LX850 Series . ... For over 30 years, itтАЩs been our passion to create the finest telescopes available for the astronomy enthusiast. ... Events . Meade Events . ... Event Calendar . Northeast Astronomy Forum & Telescope Show (NEAF) . ... Meade is happy to announce that we will be attending the Northeast Astronomy Forum & Telescope Show, a.k.a. NEAF, one of the largest astronomy trade shows in the United States. ...

Amanda Karakas One of the most important research fields in astrophysics is the study of the origin of the elements. ... Asymptotic Giant Blanch (AGB) Stars: For low and intermediate-mass stars (with initial masses between about 0.8 to 8 solar masses) the most important nucleosynthesis occurs when stars evolve off the main sequence to the giant branches. ... This indicates that these stars obtained their unusual abundances via mass transfer from a previous red giant star, that has long evolved away. ...

... Credit: GALEX Team , Caltech , NASA Explanation: Intriguing galaxy pair M81 and M82 shine in this full-field view from the orbiting GALEX observatory. GALEX - the Galaxy Evolution Explorer - scans the cosmos in ultraviolet light , a view that follows star formation and galaxy evolution through the Universe . Near the bottom, magnificent spiral galaxy M81 , similar in size to our own Milky Way, shows off young stars in winding spiral arms. ... Bright Spiral Galaxy M81 from Hubble . ...

... The evolution of magnetic fields in OB-type stars from the study of open clusters of different ages . ... Wade G. A. The MiMeS Project: Magnetism in Massive Stars . ... Polosukhina N., Shavrina T., Drake N., Kudryavtsev D. Smirnova M. New results of the spectral observations of CPstars in the Li I 6708? spectral region with BTA telescope of SAO RAS . ... Magnetic Stars-2010 . ... List of participants . List of reports . ... Laboratory for the Stellar Magnetism Study of SAO of the RAS . ...

... The ruze formula gives the fractional gain caused by errors in the surface: fracgain=exp(-(4*pi*delta/lambda)^2) ... delta=rms surface error,lambda=wavelength The fractional gain is gainMeasured/gainExpected . ... The gains we measured include losses from pointing errors, pitch/roll/focus (prf) errors, and errors from the surface. ... Figure 7 shows the fractional gain from the pitch/roll/focus errors. Figure 8 shows the measured gain corrected for the pitch/roll/focus errors. ... Figure 11. ...

... Radiation mechanisms of astrophysical objects: classics today . ... S.A. Balashev, D.A. Varshalovich, A.V. Ivanchik, V.V. Klimenko , Ioffe Institute, Russian Federation . ... D.P. Barsukov, A.I. Tsygan , Ioffe Institute, Russian Federation . ... A.I. Kopylov, F.G. Kopylova , Special Astrophysical Observatory (SAO RAS), Russian Federation . ... F.G. Kopylova, A.I. Kopylov , Special Astrophysical Observatory (SAO RAS), Russian Federation . ... Conference poster . ... Slide shows and posters . ...

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BNO is in Baksan Gorge at the Northern Caucasus . ... The Baksan Underground Scintillation Telescope (BUST) of volume 3000 cubic centimeters at a depth of more 300 m. The mountainous plant ANDYRCHI to register wide air showers located over BUST on the area 5*10 4 square metres. The complex of surface plants KOVER including a large muon detector, a scintillation telescope and a neutrino monitor meant for studying the hard component of cosmic rays and wide air showers. ...