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. Families of periodic solutions of the planar restricted three-body problem and their application at designing the orbit for the space radio telescope . A. B. Kreisman . Astro Space Center of Lebedev Physical Institute of Russian Academy of Sciences, Moscow, Russia Abstract: . No abstract Key words: . Very Long Baseline Interferometry (VLBI), celestial mechanics, periodic solutions, planar restricted three-body problem, space radio telescope.

... Our Sun is part of a huge wheel-shaped collection of stars. ... Astronomers have long suspected it was a very massive black hole, and that every galaxy had such a central mass, created early in the history of the universe. ... However, unless that object happens to be headed directly at the black hole (a relatively small target) it will just swing around and fly away again, like a comet making a pass at the Sun. The velocity acquired in falling towards the black hole also helps it escape. ...

Появление жизни основанной на аминооксидах и РНК/ДНК на планетах земного типа требует довольно узкого диапазона физических параметров. Наиболее важные из параметров это масса планеты и температурные условия. Кроме того, только звезды спектральных классов от F до K могут иметь планеты пригодные для жизни. ... умеренную гравитацию; . ... умеренный период вращения; . умеренный экцентриситет орбиты; . умеренный наклон экваториальной плоскости к плоскости орбиты; . ...

... They are concerned with Attitude Control System of the spacecraft, satellite visibility from tracking stations, limits on the satellite autonomous operations during the orbit, and needs for auxiliary operations with the spacecraft. ... Among the operational constraints the most important one is the number of programmed slews per orbit, which determines the maximum number of radio sources to be observed during one orbit. ... System temperature (K) . ... Progress of the RadioAstron Project in Pictures...

... Доска объявлений (продам) (Модераторы: zlyden , Denk36 ) ? Продам МСТ-180 и камеры и прочие аксессуары . ... Сообщений: 3 739 . ... Restricted . ... Возможен торг. lumenera1.jpg (62.83 КБ, 567x722 - просмотрено 168 раз.) . lumenera2.jpg (57.26 КБ, 709x501 - просмотрено 130 раз.) ... Продам мою легендарную камеру Celestron NexImage, перешита в RAW, работает нормально, состояние хорошее (даже коробка сохранилась), 4200 рублей. neximage1.jpg (59.71 КБ, 314x425 - просмотрено 126 раз.) . ...

... 2008 April 16 . A Protected Night Sky Over Flagstaff . ... Explanation: This sky is protected. Yesterday marked the 50 year anniversary of the first lighting ordinance ever enacted, which restricted searchlight advertisements from sweeping the night skies above Flagstaff , Arizona , USA . Flagstaff now enjoys the status of being the first International Dark Sky City , and maintains a lighting code that limits lights from polluting this majestic nighttime view . ... About APOD | ...

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Astronomy Picture of the Day . International Space Station in Transit . ... Credit: Tom Laskowski Explanation: A stunning telescopic image of the International Space Station crossing in front of an eight day old Moon, this picture was captured on April 11th. ... Seen below the lunar terminator at the lower left, the International Space Station appears here at a distance of just over 400 kilometers, with the Moon nearly 400,000 kilometers away. ... Publications with keywords: ISS - Moon - transit . ...

. What is ChASeM33? . Purpose & Aims . Pictures . Links . Presentations . Scientific Publications . The ChASeM33 First Look Catalog . The ChASeM33 Final Source Catalog . Project web page (restricted access) . Last updated 2011-02-22 12:58:38 EST

. Microwave Chains . The majority of the modified Nobeyama radio heliograms corresponds to the restricted range of the brightness temperature of Tb~5000-20000 K. On the negative Nobeyama radio heliograms, the white (i.e. absorption) features are radio filaments. October 30-31, 1992 . May 10-15, 1993 . November 1-4, 1993 . August 20-September 02, 1998 . Back to the parent page . Last update: 2 April 1999 .