Supernova 2009js in NGC 918 . This page is devoted to information on Supernova 2009js in NGC 918 . Basic information on this SN, including the last reported brightness, on this Supernova can be found on the main page . Information on the original web pages for many of these images can be found on the updates and links web pages. Discovered independently by Lick Observatory Supernova Search (USA) and Koichi Itagaki (Japan). ... 2009/10/11.44 . 17.2 . ... Joseph Brimacombe . ...

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 . ...

... Star Atlas . ... Behemoth black hole found in an unlikely place . ... black holes . ... If a supernovaт??s original star is massive enough to form a black hole, why is there any explosion? Why doesnт??t the entire mass of the original star simply fall onto the newly formed black hole and instantly vanish? ... For some massive stars, it may be possible that collapse leads directly to the formation of a black hole with no explosion. ... Get instant access to subscriber content on Astronomy.com! ...

... Luminous blue variable (LBV) stars are the most massive stars with 40-120 solar masses, which are passing the short stage of evolution losing their hydrogen envelopes before exploding as Supernovae. These are extremely rare objects, only about a dozen of the most massive LBVs are known in the Galaxy. ... In the spectral observations of stars with infrared circular nebulae, found in the Spitzer survey (24 microns), a new LBV star in the Galaxy was discovered. It was named MN112. ...

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Hot subdwarfs are hots stars with masses somewhat less than that of the Sun. ... They are known as sdB stars because their spectra are dominated by hydrogen lines. ... Normally, a red giant will switch on core helium burning without losingthe layers of hydrogen around the helium core. sdOB stars are related to sdB stars, possibly being the sdB stars which have completed core helium burning and are evolving to become white dwarfs. ... Such stars are known as PG1159 stars and DO white dwarfs. ...

... A Snapshot Survey of The Most Massive Clusters of Galaxies . ... SNAPshot observations of gravitational lens systems discovered via wide-field Herschel imaging . ... Understanding the Gas Cycle in Galaxies: Probing the Circumgalactic Medium . ... ACS images of galaxy-galaxy Einstein ring lenses from the Sloan survey . ... The Sloan Digital Sky Survey is a powerful tool for identifying candidate galaxy-galaxy lenses, and has provided targets for HST imaging programs in several previous cycles. ...

... Credit: Greg Bacon ( STScI ), NASA Explanation: The last decade saw the profound discovery of many worlds beyond our solar system, but none analogs of our home planet Earth . Exploiting precise observational techniques, astronomers inferred the presence of well over two dozen extrasolar planets , most nearly as massive as gas giant Jupiter or more, in close orbits around sun-like stars. ... Publications with keywords: extrasolar planet - planet - Saturn - planetary system . ... Crescent Saturn . ...

... 2010 November 21 . A Massive Star in NGC 6357 . ... Explanation: For reasons unknown, NGC 6357 is forming some of the most massive stars ever discovered. One such massive star, near the center of NGC 6357 , is framed above carving out its own interstellar castle with its energetic light from surrounding gas and dust. ... Near the more obvious Cat's Paw nebula, NGC 6357 houses the open star cluster Pismis 24 , home to many of these tremendously bright and blue stars. ... About APOD | ...

Astronotes Armagh Planetarium's Stellar Blog! ... Solar System . ... Planets . ... This bizarrely shrunken planetary system was found by NASAтАЩs Kepler mission, hence the parent star has been named Kepler-11. ... Planetary scientist and Kepler science team member Jack Lissauer said ?These six planets are mixtures of rock and gases, possibly including water.тАЭ €аNone of these strange new worlds are likely to be home to any form of life; their surface conditions are simply too extreme. ...

... Feeding the Monster: Gas Caught in its Death Spiral into a Massive Black Hole . ... Stromlo Professor Mike Dopita have used the Hubble Space Telescope to discover how a massive Black Hole in a nearby galaxy feeds itself. ... Earlier Hubble Telescope data obtained by another team member, Professor Holland Ford of Johns Hopkins University in Baltimore, Maryland, had found a disk of gas rushing around the Black Hole at a speed of 500 kilometers a second. ...

... A2641 Date Received: 2011-Jun-02 15:27:34 Technical Page Proposal Type: General Category: Sub-Category: Observation Category: Total Time Requested: Minimum Useful Time: Prop osal Title: ABSTRACT: Long-term Astronomy Spectroscopy Galactic 72 Hours 1 hour Arecibo Survey for Periodic CH3 OH and OH Maser Flares We have conducted a long-term Arecibo monitoring program for formaldehyde, methanol and hydroxyl masers toward the massive star forming region IRAS 18566+0408. ...

... HIZOA J0836-43: a massive galaxy . ... The galaxy HIZOA J0836-43 was discovered by Donley et al. (2006) in the Parkes HI Survey of the Zone of Avoidance (HIZOA) and is also detected in the HI Parkes All Sky Survey (HIPASS) . ... The extended neutral hydrogen disk of HIZOA J0836-43, mapped with the Australia Telescope Compact Array, is at least 130 kpc in diameter (top panels) and rotates with over 300 km/s (bottom panels). ... today * ATNF | Parkes | ...

... Measurement of the MASS detectors parameters with mass program January 24, 2015 [112707] . MASS/DIMM electronics. ... Turbina-core(D): Dimm User Guide. ... N.Shatsky, V.Kornilov, The revision of the MASS/DIMM star catalogue. ... О.Возякова, В.Корнилов, Н.Шатский, Новое программное обеспечение прибора MASS/DIMM. ... V.Kornilov, N.Shatsky, S.Potanin, O.Voziakova, B.Safonov Preliminary results of astroclimate parameters measurements at the Sternberg 2.5m telescope installation site. ...

... Tidal influence on each of the galaxies in our sample is quantified by identifying and measuring the distance to the nearest companion, using a photometric technique with good completeness characteristics. ... Massnormalised starformation rates were derived using galaxy stellar masses estimated from zband luminosities Nearest companions were identified using the algorithm illustrated in Figure 1. ... Some of the lowredshift galaxies in our sample with close companions are illustrated in Figure 3. ...

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. ...

... Shortly after its discovery it was determined to be in a highly elliptical path near Jupiter and on a collision course. ... T he size and mass of the original body and the individual fragments is as of this writing still highly uncertain. ... B etween 16 July 1994 and 22 July 1994 the fragments impacted the upper atmosphere of Jupiter. ... T he pictures were posted to the Net within hours of the impacts and caused severe overloading on some ftp and WWW sites. ... JPL's SL9 page . ... Small Bodies .....

... October 2, 1999 . Phi Persei: Double Star . ... Based on recent results , this artist's vision of the double star Phi Persei , 720 light years away, shows a bright, rapidly rotating massive star surrounded by a disk of gas. A small companion star orbits 100 million miles away. ... Ten million years ago the small companion was actually the most massive star in the system and because of its greater mass evolved into a giant star more quickly. ... About APOD > . ...

. Subdwarfs . Metal deficient red giants in galactic field . Red horizontal branch stars . Blue horizontal branch stars . Extended horizontal branch stars . Stars inside globular clusters . W Vir type stars . IRAS-sources identified with peculiar supergiants . RCrB type stars . Sakurai's object . peculiar supergiant FG Sge .

... This appartus will drop a mass from different heights. When the mass strikes the ground, some percentage of its original energy will be absorbed by the ground. ... The percentage of the energy which is absorbed by the surface on each "bounce" (EAS) . ... The impact velocity of the object will also be given at each bounce. ... Start= Drop the ball after Energy, Mass and EAS have been set; resume after step or pause has been selected . ... Reset = Reset experiment to intial values . ...