... 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. ...

... This course is an introduction to the theory of braid groups associated to finite reflections groups. ... To each finite reflection group, one may associate a braid group; the intuitive braid group on $n$ strings is a particular example, associated with the symmetric group. ... Brieskorn's theorem about presentations of braid groups; . ... cohomology of braid groups; . ... The course will be essentially self-contained, the only prerequisites being basic group theory and basic algebraic topology. ...

Next: Methods for Structuring and Searching Very Large Catalogs . ... We have explored two automated classification methods: supervised classification using Artificial Neural Networks (ANN) and unsupervised classification using Self Organized Maps (SOM). These methods are used to classify IUE low-dispersion spectra of normal stars with spectral types ranging from O3 to G5. This paper describes the application of automated methods to the problem of the classification of stellar spectra. ...

... ATNF Home . ... About ATNF overview . ... Australia Telescope Steering Committee . ... Parkes radio telescope . ... Remnant Molecular Clouds in the Ori OB 1 Association . ... A list is presented of about 80 objects of these remnant clouds in the Ori OB 1 association. ... We suspect that retarded star formation in remnant clouds can explain the presence of so-called dispersed T Tau stars in the peripheries of OB associations. ... ISM: molecular clouds - ISM:globules - HII regions - OB associations . ...

... The association log contains a list of calibration products used to process a raw file (or a set of raw files). ... The header of the association log contains the name of the association block , a data type tag, a setup tag, and the flag COMPLETE or INCOMPLETE (in case of missing calibrations). ... FLAG: not relevant here (always REAL) . ... OK MCALIB REAL GI_PFEE_071012A_Medusa1_L543.1nm_o3.fits FF_EXTERRORS 0.458 OK MCALIB REAL GI_PDIS_071012A_Medusa1_L543.1nm_o3.fits DISPERSION_SOLUTION 0.462 . ...

Peremennye Zvezdy ( Variable Stars ) 33 , No. ... The new variable star HD 305629, with a Cepheid-like light curve, is demonstrated, from our optical observations and ASAS-3 data, to actually be an ellipsoidal variable star on a highly eccentric orbit. ... During a systematic search of variable stars in the publicly available ASAS-3 database (Pojmanski 2002), apparent variability was found in the star HD 305629 (10 51 34 35, -60 47 57 4, J2000.0; Fig. ... The light curve and color curves of HD 305629. ...

НАУЧНО-ПРОИЗВОДСТВЕННОЕ ОБЪЕДИНЕНИЕ им. С.А. ЛАВОЧКИНА . ... ЭкзоМарс 2016 . ... Социальные проекты . ... Проекты . ... ФГУП 'НПО им. С.А. Лавочкина' - крупное конструкторское и научно-производственное предприятие, проводящее работы по проектированию, изготовлению, испытанию и комплексной отработке ключевых автоматических космических аппаратов для фундаментальных научных исследований. ... Новости Проекты . ... 2016, ФГУП "НПО им. С.А. Лавочкина" - все права защищены ? ...

Next: Observations and Data Reduction Up: Coronal Hole Diagnostics out Previous: Coronal Hole Diagnostics out . ... Line width variations combined with simultaneous electron density estimates, provides a very powerful diagnostic for the solar corona. ... They find that for distances of a few arc seconds outside the solar limb, the average line of sight electron densities in the coronal holes are about a factor of 2 lower than in quiet sun regions. ... The Western limb data showed a similar trend. ...

... 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. ...

... Corvus Capital, along with its own capital, has the backing of a number of international funding partners. ... MyCloudtag App has launched in the Apple App Store Google Play store! App Fitness & Health . Andrew Regan lead a 10 man team on the first ever there-and-back crossing of the Antarctica. ... CloudTag is a London Listed Company focused on the Fitness and Wellbeing Market. AIM Fitness & Health . Sirius Petroleum is an Oil Gas Company listed on London's AIM. AIM Oil & Gas . ...