Next: Star Formation and Stellar Up: Stellar Astrophysics Previous: The Chemical Evolution of . Amir Ahmad and Simon Jeffery have been studying some rare stars known, loosely, as helium-rich subdwarfs. ... Further study showed that PG1544+488 is in fact a double star with both stars having extremely helium-rich surfaces -- the first case known. ... Next: Star Formation and Stellar Up: Stellar Astrophysics Previous: The Chemical Evolution of M.E. Bailey . ...

Spitzer Space Telescope mid-infrared spectroscopy has been obtained for 15 carbon-rich protoplanetary nebulae (PPNe) in the Large Magellanic Cloud (LMC) and for two other such stars in the Small Magellanic Cloud (SMC). Of these 17 PPNe, the unidentified 21 ѕ®m feature is strong in 7 spectra, weak in 2 spectra, and very weak or questionable in 4 spectra. ... The remaining two objects show typical carbon-rich PPNe spectra with no 21 ѕ®m features. ...

Life from Mars: . The Discovery . ... Meteorite Yields Evidence of Primitive Life on Early Mars (August 7, 1996) . Life from Mars: Video Animations . ... The NASA-funded team found the first organic molecules thought to be of Martian origin; several mineral features characteristic of biological activity; and possible microscopic fossils of primitive, bacteria-like organisms inside of an ancient Martian rock that fell to Earth as a meteorite. ... Mars Life? Microscopic Structures . ...

... November 8, 1997 . Aristarchus' Unbelievable Discoveries . Credit: Space Shuttle Columbia , STS58 , NASA . ... Aristarchus, who lived from 310 BC to 230 BC, postulated that the planets orbited the Sun - not the Earth -- over a thousand years before Copernicus and Galileo made similar arguments. ... Aristarchus' discoveries remained truly unbelievable to the people of his time but stand today as pillars of deductive reasoning. ... About APOD > . ... NASA Technical Rep.: ...

Astronomy Picture of the Day . ... 8.11.1997 . ... Credit: Space Shuttle Columbia , STS58 , NASA Explanation: Here lived one of the greatest thinkers in human history. Aristarchus lived on the Greek island of Samos, a small island in the center of the above picture that can be identified with a good map . Aristarchus, who lived from 310 BC to 230 BC, postulated that the planets orbited the Sun - not the Earth -- over a thousand years before Copernicus and Galileo made similar arguments. ...

... Posts tagged ?false discovery? ... Without an optical afterglow, a galaxy within the 2 arc second error region of a GRB x-ray afterglow is identified as a host galaxy; however confusion can rise due to the facts that 1. the edge of a galaxy is diffused, 2. multiple sources could exist within 2 arc second error region, 3.the distance between the galaxy and the x-ray afterglow is measured by projection, and 4. lensing causes increase of brightness and position shifts. ... ArXiv] GRB host galaxies, Aug...

... Southern . ... Science Activities > PhD Thesis Topics offered by ESO Faculty Members > Thesis Topic: Discovery and characterisation of Pre Main Sequence stars in southern star forming regions . ... Observing with ESO Telescopes . ... ESO-MIDAS . ... Using a robust method to identify Pre-Main Sequence (PMS) stars through their photometric excess in the Hн± band, we have recently studied the star formation history in several star burst clusters in the Galaxy, Small and Large Magellanic Clouds. ...

... Laboratory and theoretical modelling of the UV bump on the interstellar extinction curve is a very popular topic in dusty investigations. ... feature is illustrated by Fig. 10 where the profiles were calculated using the model of graphite spheres. Figure 10: Normalized extinction efficiencies for graphite spheres. ... The lower panel shows the summary extinction of two graphite spheres with radii and (from upper panel) taken in equal proportions. ...

... 9857 5.00 5.27 5.14 0.03 19.6 10.3 10 2006 06 21 Jupiter Trojan 9881 1.38 3.30 2.34 0.41 8.1 15.9 9 2008 04 08 13060 4.53 5.82 5.18 0.12 22.9 10.3 9 2004 05 19 Jupiter Trojan 13551 1.45 3.60 2.52 0.43 5.3 16.1 8 2008 03 02 17640 1.50 3.14 2.32 0.35 25.4 14.0 9 2004 12 19 18514 1.35 3.78 2.57 0.47 24.9 15.9 7 2010 05 10 23480 4.77 5.66 5.22 0.09 22.5 11.4 9 2005 06 10 Jupiter Trojan 48438 4.95 5.28 5.11 0.03 31.4 10.2 10 2006 12 31 Jupiter ...

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... The effect is strongest in the most evolved, high-latitude supergiant V5112 Sgr=IRAS19500-1709, which has an extended structured envelope (Figs.1 and 2). In the optical spectrum of this object, the BaII ion lines are split into three components (Figs.3 and 4). ... Thus, we discovered for the first time the enrichment of the stellar envelope with heavy metals produced at the AGB stage. ... Detection of heavy-metal lines in the spectrum of the circumstellar envelope of a post-AGB star. ...

... The search for distant objects which can be both galaxies and quasars is one of the most important problems of observational astrphysics, because it allows one to determine cosmological parameters connected with the time of appearence and evolution of stellar systems, large scale structure of the Universe. ... Radio galaxies are important objects to be studied because they are sources of infrared-optical-ultraviolet continuum, emission lines and continual radio emission. ...

. Next: Neutron stars Up: A Tutorial on Radio Previous: A Tutorial on Radio . љ . Neutron stars . The discovery . The Nature letter of February 1968 . Identification with rotating neutron stars . Early searches at other wavelengths . Jon Bell . Thu Dec 19 15:15:11 GMT 1996

... Recent Topics . ... MAO main . ... Swift: 10 years of discovery, conference reminder . ... ASICC, MAO NAS of Ukraine . ... You need JavaScript enabled to view it. ... Отправленные: Понедельник, 19 Май 2014 г 12:30:38 . Тема: > > : Swift: 10 years of discovery, conference reminder . В?д: SWIFT 10 Years Meeting [ This email address is being protected from spambots. ... Swift: 10 years of discovery? ... The meeting "Swift: 10 years of discovery? will be held on December 2-5, . ... MAO NASU . ...

Astronotes Armagh Planetarium's Stellar Blog! ... Armagh Planetarium . ... Space Flight . Human Exploration . Robot Exploration . ... Originally Discovery had been set to launch on 1 November, but this was delayed when fatigue cracks were found in the structure of its External Tank. ... A little bit of trivia is that Discovery has actually made the only shuttle-era Christmas time flight to date, this was STS-103 ,€а a mission to repair the Hubble Space Telescope in 1999. ...

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... A2711 Date Received: 2012-Mar-01 18:01:39 Technical Page Proposal Type: General Category: Sub-Category: Observation Category: Total Time Requested: Minimum Useful Time: Prop osal Title: ABSTRACT: Regular Astronomy Spectroscopy Galactic 7.0 Hours 2.0 hours Search for methyl carbamate - a glycine isomer - in W51 and TMC-1 The discovery of complex molecules in space has led to the search for amino acids, the pre-biotic molecules, in the ISM. ... However, the search so far has been unsuccessful. ...

Download Izmccd (~2.7 MB). Solution of problems at identification of star field. ... 2) Scale is not correct. ... In this case algorithm of identification will revise all values of scale from twice smaller up to twice greater. ... There should be more than value of the field "Number of stars in frame". ... The star field is considered identified if number of the identified stars more or equally to this value. It is necessary to set value from 4 up to value of field "Number of stars in frame". ...

... 640W A survey of ultracompact (UC) Hii regions has been carried out by searching for 6.669-GHz methanol maser emission from a sample of 535 IRAS-selected candidates. A total of 201 candidates exhibit methanol emission. These sources have been used, in conjunction with previously identified UC Hii regions, to provide a base for further studies of such regions. ... Methanol maser and/or radio continuum emission is found in 364 cases towards IRAS-selected regions. ...

What follows is a brief list of benchmarks and discoveries that shaped our ideas on atoms and nuclei. ... Discovery of electrons . ... Comparing this to Faraday's results, one could get " Avogadro's number ", the number of (say) hydrogen atoms in one gram of hydrogen--an enormously large number. ... Similarly, energized atoms are only allowed to exist in one of a number of energy levels. ... By the way, Avogadro's number is 602,000,000,000,000,000,000,000 (6.02 10 23 ) molecules in 1 gr hydrogen. ...