... Gravity Esc vel M.O.V Axial Ascend Peri- Equilib Surface Press Atmospheric Name (g) (km/s) (km/s) incl Oblate node helion (K) (K) (atm) Composition --------- ------- ------- ------ --- ... - ------ ----------- Mercury 0.378 4.25 47.87 0 48.35 77.44 449 440 0 -- Venus 0.905 10.36 35.02 177.36 76.72 131.56 328 730 93 CO2 , N2 Earth 1.000 11.18 29.79 23.45 .00335 354.90 102.83 279 287 1 N2, O2, Ar Mars 0.379 5.02 24.13 25.19 .00519 49.60 335.99 226 ...

... solve : find optimum fit in a grid of model spectra . ... It initiates an optimisation by starting with a grid of theoretical spectra, defined by model or read_grid , a set of starting parameters and an observed spectrum. ... The parameters to be optimised include: T eff , log g , n A , v sin i , v rad being effective temperature, surface gravity, an abundance variable, rotation velocity and radial velocity for one or two stars, and R 2 / R 1 being the relative radius of the second star, if present....

... Maryland , JPL-Caltech , NASA Explanation: Fireworks came early on July 4th when, at 1:52am EDT, the Deep Impact spacecraft's probe smashed into the surface of Comet Tempel 1's nucleus at ten kilometers per second . ... Tempel 1's potato-shaped nucleus is approximately 5 kilometers across as seen from this perspective. Camera's onboard the impactor probe were also able to image the nucleus and impact site up-close ... until about 3 seconds before the impact. ... Comet Lovejoy over The Great Wall . ...

Titan . ... Hubble Space Telescope Images of Titan's surface . ... Later that year, it will release the European-built Huygens probe for a descent through Titan's atmosphere. ... This artist's rendering shows the European Space Agency's Huygens probe descending into the atmosphere of Saturn's moon Titan after being released by NASA's Cassini spacecraft. ... This artist's rendering shows the Huygens probe on the surface of Saturn's moon Titan after being released by NASA's Cassini spacecraft. ...

... 2005 July 5 . Thirteen Seconds After Impact . ... Maryland , JPL-Caltech , NASA . Explanation: Fireworks came early on July 4th when, at 1:52am EDT, the Deep Impact spacecraft's probe smashed into the surface of Comet Tempel 1's nucleus at ten kilometers per second . ... Cameras onboard the impactor probe were also able to image the nucleus and impact site up-close ... until about 3 seconds before the impact. ... Tomorrow's picture: before impact . ... About APOD | ...

... By admin September 24, 2010 Posted in: Planets . ... Although it is hard to imagine technology that could enable people to survive on Venus that has not stopped a few science fiction tales from describing humans visiting or settling on the surface of Venus; the TV series Space Odyssey (2004) and Defying Gravity (2009) had near future astronauts in armoured spacesuits making brief EVAs on the planet. ... I googled ?on venus, what would kill you first?? and this page was the number one result. ...

... We present a computer program for modelling energy flux distribution and light curves of eclipsing binaries from far ultraviolet to infrared regions. The Roche model is assumed. Proximity effects of components (reflection of radiation and surface gravity darkening) are taken into account. ... Figure 1: The surface temperature distribution for Algol A-B system before (upper plot) and after (lower plot) correction for temperature due to the irradiation effect. ...

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CCD Performance . ... The dark current appears to have two components: one from electronic sources in the CCD, and a second component whose strength correlates with the cosmic ray flux. ... As of this writing, the " DARKTIME" keyword in the WFPC2 image headers does not reflect correctly the actual time during which the CCD collects dark current. ... External exposures of 180s or longer made with the serial clocks off (CLOCKS=NO; the default setting) suffer an additional 60s of darktime (restart=1). ...

... This appartus will drop a mass from different heights. When the mass strikes the ground, some percentage of its original energy will be absorbed by the ground. ... The percentage of the energy which is absorbed by the surface on each "bounce" (EAS) . ... The impact velocity of the object will also be given at each bounce. ... Start= Drop the ball after Energy, Mass and EAS have been set; resume after step or pause has been selected . ... Reset = Reset experiment to intial values . ...

... In the central equatorial Pacific, the large area of warmer than normal sea surface temperatures (large area outlined in red with a white center) associated with growing El Nino conditions has recently migrated eastward toward the coast of South America. http://physicaplus.org.il/zope/home/en/1105389911/1113511992_en На этой странице есть презентации с конференции, где активно обсуждалась . ... Картинка со страницы со статьей Шавива. http://physicaplus.org.il/zope/home/en/1105389911/1113511992_en . ...

... The ruze formula gives the fractional gain caused by errors in the surface: fracgain=exp(-(4*pi*delta/lambda)^2) ... delta=rms surface error,lambda=wavelength The fractional gain is gainMeasured/gainExpected . ... The gains we measured include losses from pointing errors, pitch/roll/focus (prf) errors, and errors from the surface. ... Figure 7 shows the fractional gain from the pitch/roll/focus errors. Figure 8 shows the measured gain corrected for the pitch/roll/focus errors. ... Figure 11. ...

... Kepler's Laws . ... Second Law . 12a. More on 2nd Law . ... Kepler's 2nd law prescribes the way the velocity V of an object orbiting a single center varies around its orbit: . The rate at which the line to the center ("radius vector") covers area does not change around the orbit." As noted in section #12 , this means that the object's velocity V increases when its distance r decreases, and vice versa. ... Because by Kepler's 2nd law, the Earth moves in its orbit a little faster in winter. ...

Журнал ПОВЕРХНОСТЬ публикует оригинальные статьи и обзоры по наиболее актуальным проблемам изучения поверхностных явлений. ... Редакция журнала 'Поверхность. ... Англоязычная версия журнала Journal of Surface Investigation . X-Ray, Synchrotron and Neutron Techniques выходит 6 раз в год . The Journal of Surface Investigation. X-ray, Synchrotron and Neutron Techniques ( Poverkhnost '. ... X-ray, Synchrotron and Neutron Techniques is abstracted and/or indexed in (Impact Factor 0.359): . ...

Saturn: The beauty of the rings. Saturn . ... Belongs to the giant planets . It has no definite solid surface. ... The free fall acceleration at the Saturn surface near equator is 9,06 m/s^2 . ... In the centre of the planet the temperature is about 20000K. The satellites . ... The rings of Saturn . ... It is proved that Saturn's rings (as well as the other planet's) are the fragments of the great cloud being near the planet with million kilometres length (see how the rings were formed ). ...

... Space flight . ... Zero Gravity . ... Characteristics of a Complex Flight: . ... Characteristics of the Reduced Gravity (Lunar Gravitation): . ... Characteristics of the Reduced Gravity (Martian Gravitation): . ... Services / Zero Gravity: General description Technical description Flight parameters Photo gallery Price . ...

... Proximity e#ects of com­ ponents (reflection of radiation and surface gravity darkening) are taken into account. ... As an example, we consider the Algol (# Persei) system, where an eclipsing pair (Algol A­B) is accompanied by the third component (Algol C). ... The surface temperature distribution for Algol A­B system before (upper plot) and after (lower plot) correction for temperature due to the irradiation e#ect. ... We solve this equation by the iterative Newton­Raphson method. ...

Class 1 Introduction, Background History of Modern Astronomy The Night Sky, Eclipses and the Seasons Kepler's Laws Newtonian Gravity General Relativity Matter and Light Telescopes Class 2 Solar System Characteristics Formation Exosolar Planets Class 3 Stars The S un Stellar Evolution of Low and High Mass Stars Deaths of Stars Exotic Stars Class 4 Galaxies Galaxy Classification Formation of Galaxies Galactic ... Low mass stars live and die differently than high mass stars. ...

КАТАЛОГ ВОЗРАСТОВ, МЕТАЛЛИЧНОСТЕЙ, ЭЛЕМЕНТОВ ОРБИТ И ДРУГИХ ПАРАМЕТРОВ БЛИЗКИХ F-ЗВЕЗД . ... В. Марсаков, Ю. Шевелев . ... Подробнее о методах вычисления возрастов и элементов орбит звезд см. в работах Марсаков & Шевелев (1993) и Марсаков & Шевелев (1994). ... A & A, 22, 255 // Первая цитата в статье . ... Первая цитата в статье . ... Марсаков В.А. & Шевелев Ю.Г. 1993, АЖ, 70,1218 // Первая цитата в статье . Марсков В.А. & Шевелев Ю.Г. 1994, АЖ, 71, 368 // Первая цитата в статье . ...

. Two views of the same region on the neck of comet 67P/Churyumov-Gerasimenko. The right image was taken with an exposure time of less than a second and shows details on the comet s surface. The left image was overexposed (exposure time of 18.45 seconds) so that surface structures are obscured. At the same time, however, jets arising from the comet s surface become visible. ESA/Rosetta/MPS for OSIRIS Team MPS/UPD/LAM/IAA/SSO/INTA/UPM/DASP/IDA