... Piotrovich Main Astronomical Observatory, Pulkovo, St. Petersburg, Russia Received May 24, 2006; in final form, July 7, 2006 Abstract--We have used two astrometric methods developed at the Main Astronomical Observatory of the Russian Academy of Sciences--the method of apparent-motion parameters (AMP) and a direct geometrical method (DGM)--to derive the orbit of the star S2 around the Galactic center, and thereby the mass of the supermassive black hole at the Galactic center. ... Relative positions. ...

... Chilingarian, I., Melchior, A.-L., Zolotukhin, I. 2010: Analytical approximations of K -corrections in optical and near-infrared bands , accepted to MNRAS (arXiv:1002.2360) . ... K-Corrections in the optical and near-infrared , Analytical approximations of K-corrections in optical and near-infrared bands , photometric properties of galaxies , K-corrections approximation redshift and one observed colour , transform observed spectral energy distributions (SED) , software to estimate K-corrections , ...

... Even though the DoD would ultimately select senior Air Force officials, US Navy oceanographers and Air Weather Service officers as shuttle payload specialists, MSEs would be the first personnel from an American military programme to go into space. ... One Air Force officer, Maj. ... Jacobson was concerned about shuttle launch delays and wanted the MSEs to understand that his mission, i.e., the launch of national security payloads, dwarfed their mission, flights in space by Air Force personnel. ...

... Сегодня: 10 апреля 2016 г. ВВС США намерены до 2011 года развернуть новую систему слежения, предназначенную для защиты спутников от ракет потенциального противника и других возможных угроз, сообщает Aviation Week. ... По мнению американских военных экспертов, потеря спутников связи и навигации в результате ракетного нападения может привести к полной дезорганизации вооруженных сил США и стать своего рода "космическим Перл-Харбором". ... Большая часть информации по космическим проектам США засекречена...

... Archive of publications: . ... 2005 . ... S.V.Kuzin , I.A.Zhitnik , S.V.Shestov , S.A.Bogachev , O.I.Bugaenko , A.P.Ignat'ev , A.A.Pertsov , A.S.Ul'yanov , A.A.Reva , V.A.Slemzin , N.K.Suhodrev , . ... S.V.Kuzin , S.A.Bogachev , I.A.Zhitnik , A.A.Pertsov , A.P.Ignat'ev , A.V.Mitrofanov , V.A.Slemzin , S.V.Shestov , N.K.Suhodrev , O.I.Bugaenko , . ... I.M.Chertok , V.V.Grechnev , V.A.Slemzin , S.V.Kuzin , O.I.Bugaenko , I.A.Zhitnik , A.P.Ignat'ev , A.A.Pertsov , J.-P.Delaboudiniere , . ...

The rising tides. In 1777 Laplas made a report in the Paris academy about the rising tides and the falling tides. Their first model was considered by Newton and Kepler so that the rising tides and the falling tides were caused by the Moon and the Sun. This theory was developed by I. Bernully, Ailer and d'Alamber. Their scheme about the rising tides following on two directions (one to the Moon and the other to the Sun) was suited the non deep ocean in the stable planet. ...