... Observing . ... Solar Observing . ... April 3 (SUN) - Solar Observing, Central Park , Manhattan . ... APRIL'S SKY . ... Lecture Series at the American Museum of Natural History The Amateur Astronomers Association is proud to present an astronomy lecture series from October through May each year for our members and the .. ... The€аAmateur Astronomers Association of New York€аwas organized in 1927 to promote the study of Astronomy, emphasizing its cultural and inspirational value. ...

... The orange dot in the above false-color drawing represents the current location of the Sun among local gas clouds in the spiral Milky Way Galaxy . ... The purple filaments near the Sun are gas shells resulting from star formation 4 million years ago in the Scorpius-Centaurus Association, located to the Sun's lower left. ... Publications with keywords: Sun - Solar Neighborhood - interstellar medium - Milky Way . Publications with words: Sun - Solar Neighborhood - interstellar medium - Milky Way . ...

... Early studies of PMS stars focused on T associations, especially Taurus-Auriga. However, one might expect low mass star formation to be different in OB associations. ... He identified Orion OB1a as the stars northwest of the belt. Orion OB1b is composed of the stars near the belt, including the belt stars and Orionis. ... He finds no perceptible distance change within the Orion OB1b association and finds the distance modulus to be 7.8 and 7.9 for Orion OB1a and OB1b respectively. ...

EVOLUTION OF GALACTIC DISCS: TWO MODES OF STAR FORMATION ABSTRACT We develop the model of the evolution of surface gas density, stellar density, star formation rates and chemical composition of galactic disc taking into account the gravitational instability of rotating gaseous layer in the scales of several kpc. ... In the model we took into account the gas return from evolved stars, a radial movement of the gas in a spiral arms and accretion of the gas into the galactic disc. ...

... 2000, ApJ, 537, L49 . ... F. Palla . Invited Talk at the IAU Symposium 200 "The formation of binary stars" eds. R.D. Mathieu and H. Zinnecker (ASP Conf. Ser.) in press . Optical follow-up of ROSAT discovered candidate members of the open cluster Coma Berenices . ... 2000, A , in press . ... 2000, ApJ, in press . ... 2000, ApJ, in press (Sept. ... 2000, ApJ Lett., in press . ... Click to examine publications from other years . ... Star Formation Group . ... Arcetri Home Page . ...

Next: M.E. Bailey, Director Up: Research Previous: C.S. Jeffery, Research Astronomer Contents . Dr Michael Smith has focused mainly on the earliest stages of stellar evolution: the processes leading to star formation from an initially unstable, collapsing cloud of gas, and the energetic outflows -- jets and winds -- associated with the formation and early evolution of protostars and pre-main-sequence stellar objects. ... Spectacular jets of molecules, however, betray its presence. ...

... l - the mean galactic longitude; . ... mul - the median proper motion along galactic longitude of the stars of the OB-association, in units of 0.001 arcsec year -1 ; . dml - the estimation of mul dispersion in the OB-association, in 0.001 arcsec year -1 ; . mub - the median proper motion along galactic latitude of the stars of the OB-association, in units of 0.001 arcsec year -1 ; . dmb - the estimation of mub dispersion in the OB-association, in 0.001 arcsec year -1 ; . ...

Large-scale wave processes in space plasma. ... G.V.Lizunov, O.P. Verkhoglyadova, and K.I. Churyumov, Plasma- beam instabilities in comatary ionospheres, Russian Astronomical Journ. ... Verkhoglyadova, O.P., V.V. Grimalsky, Propagation of ion- sound solitons in unhomogeneous plasma, Ukrainian Phys. Journ., ... Verkhoglyadova, O.P., Ivchenko, V.N., Plasma regime identification technique using magnetospheric satellite measurements, Space Sci. and Technology, 4 (5/6), 18-27 (1998) (in Ukrainian). ...

Компания Aeronautics and Cosmonautics Romanian Association (Asociatia Romana pentru Cosmonautica si Aeronautica - ARCA) была организована студентами факультета аэронавтики (Facultatii de Inginerie Aerospatiala) Бухарестского университета в 1999 году. ... В 2002 году эта ракеты была впервые показа публике, и 16 октября 2002 года компания ARCA официально включилась в борьбу за X-Prize. Целью компании было создание пилотируемого корабля ORIZONT . ...

... 319, P L1-L4 (1997). ... Article in PDF format (128 KB) . ... 319, P L9-L12 (1997). ... 319, P L13-L16 (1997). ... 319, P L17-L20 (1997). ... 319, P L21-L24 (1997). ... 319, P L25-L28 (1997). ... 319, P 729-736 (1997). ... 319, P 737-746 (1997). ... 319, P 747-756 (1997). ... 319, P 757-763 (1997). ... 319, P 764-780 (1997). ... 319, P 781-787 (1997). ... 319, P 788-795 (1997). ... Using the Earth orientation parameters to link the Hipparcos and VLBI reference frames . ... helpdesk@link.springer.de ...

... The ROSAT Bright Survey: II. Catalogue of all high-galactic latitude RASS sources with PSPC countrate CR > 0.2 s -1 . ... 1S We present a summary of an identification program of the more than 2000 X-ray sources detected during the ROSAT All-Sky Survey (Voges et al. 1999) at high galactic latitude, |b| > 30degr , with countrate above 0.2 s -1 . This program, termed the ROSAT Bright Survey RBS, is to more than 99.5% complete. ...

... of the RadioAstron Meeting . ... Chairman Kulikov S.D. · Welcome . S.D. Kulikov (10 min) . Discussion of the Agenda (10 min) . Development and tests of the spacecraft “SPEKTR-R” and general time-line of the mission . ... Time-line of development of science payload . ... E. Fomalont (NRAO), P. Diamond (EVN), D. Jauncey (Australia), . ... E. Fomalont, W. Cannon, L. Girvits, S.F. Likhachev (30 min) . ... Technical and operation experience, and science results from VSOP mission . ...

... We present a photometric and spectroscopic study of the unique isolated nearby galaxy KKR25. The isolated dwarf spheroidal (dSph) galaxy KKR25 was discovered by Karachentseva, Karachentsev Richter (1999, A , 135, 221) during the search of dwarf galaxies in the direction of the Local Void. In spite of its isolation KKR 25 has no gas and looks like a normal dwarf spheroidal system. ... This is the first known planetary nebula in a dwarf spheroidal galaxy outside the Local Group. ...

Authors: V.A. Marsakov , T.V. Borkova , . ... It is shown that general populations of globular clusters and metal-poor field stars are components at least of three subsystems occupying different volumes in the Galaxy. The thick disk and proto-disk subsystems are genetically associated with the Galaxy. ... It is argued that heavy-element enrichment and the collapse of the proto-galactic medium occurred mainly in the period between the formation of the proto-disk halo and thick disk subsystems. ...

... The processing of these associated images presents new challenges to the HST data processing pipelines, which heretofore operated only on single images. ... Stage 1 (CALNICA) calibrates individual exposures without information from other members of the association. ... Stage 2 of calibration (CALNICB) only operates on associated images that have previously gone through CALNICA processing, and creates combined images for each distinct (non-overlapping) pointing within the association. ...

In the area of environmental health and safety some of the major codes and laws are: The Occupational Safety and Health Act, National Fire Protection Association Codes , Environmental Protection Act, American National Standards Institute Codes , and all Uniform Building Codes . ... The Federal Occupational Safety and Health Act (OSHA) is an extremely comprehensive collection of regulations governing safety and health in the work place. ... These codes have been adopted into the state Fire Codes. ...

astronomy . Astro Courses . ... IYA 2009 . ... Armagh Planetarium is proud to be associated with the International Year of Astronomy 2009 (IYA2009) . IYA 2009 is a global year of events celebrating all things associated with the absorbing science that is astronomy. ... IYA 2009 Autumn/Winter events . ... Here at Armagh Planetarium one of our most important objectives is to promote formal and informal science education and there will be activities celebrating IYA 2009 throughout the year. ...

... LINKS . ... Founded in 1971 by a group of enthusiasts and star aficionados, our association is now counting more than 130 members.As a national association we attract hobby astronomers from the whole country to our regular night-sky observations and to the meetings in our club at Dudelange. ... Club News . ... by topic : PDF File Download (360KB) . by title : PDF File Download (640KB) . ... Article about AAL in "Le Quotidien" newspaper of Juli 21 2005 - PDF File Download (132KB) . ... SOME LINKS . ...

J/AstL/vol/page SAI Open Clusters Catalog (Glushkova+, 2009) ================================================================================ Automated search for star clusters in large multiband surveys. ... Color excesses E(B-V), distance moduli and ages were determined for 141 new and 27 known, but poorly studied clusters. We present the Sternberg Astronomical Institute Open Clusters Catalog (SAI OCL Catalog) of coordinates, diameters and main physical parameters of these clusters. ...

. Oct. 2 . During vibration tests at Lavochkin Association vibrational facilities . Sept.4 . Spectrum-X vibrational model is being transported to the Lavochkin vibration facility . Aug.28 . VTM model of Spectrum-X Spacecraft is ready for vibration tests at Lavochkin association . Last updated Oct. 2, 1998 by V.Arefiev, gita@hea.iki.rssi.ru .