... Ciel Espace, le magazine qui vous guide toujours plus loin . ... des pages consacr†йes †а la publication de vos photos Mais c'est aussi une vraie communaut†й avec laquelle partager votre passion et nourrir votre curiosit†й. Accueil Un ast†йro†пde sur la m†кme orbite que la Terre . ... L'ast†йro†пde 2010 SO16, d†йcouvert en septembre dernier par le satellite Wise, partage la m†кme orbite que notre plan†иte. ... Quel †йv†йnement a bien pu projeter cet ast†йro†пde sur son orbite en fer †а cheval ? ...

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• Mercure et V†йnus †а lтАЩextr†йmit†й de leur orbite | Ciel et Espace
• Des s–їjours en orbite dans une ancienne station russe ? | Ciel et Espace
• Un impact record vu en direct sur la Lune | Ciel et Espace

... Orbit . ... The orbital period of a satellite increases as its mean distance from Earth grows. ... T = 84 minutes x R x –R . ... A satellite orbiting above the equator at that distance keeps its position above the same spot on the ground; hence this is known as the synchronous orbit, from the Greek syn--same, chronos--time. ... For this reason many synchronous satellites have carried detectors for magnetic fields and for trapped or injected ions and electrons. ... Synchronous satellites . ...

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• Polar Orbiting Satellites
• Lagrangian Points
• Explorers 1 and 3

STScI . JWST . L2 Orbit . ... Missions . ... Data . ... Science Blog . ... JWST Overview . ... Image Gallery . ... Early Release Science Program . ... During the feasibility studies (1995-96), NASA and the STScI considered a wide variety of orbits for JWST. The most promising was an orbit about the Sun-Earth second Lagrange point (L2), approximately 1.5 million km from Earth, outside the orbit of the Moon. ... Address: STScI, JWST Mission Office, 3700 San Martin Dr, Baltimore, MD 21218 . ...

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• NICMOS Focus: Design vs. On-Orbit Performance
• Comparison of One-Orbit Dither Strategies
• Comparison of Half-Orbit Dither Strategies

... Parameters of the Moon-perturbed orbit . ... From orbits consistent with this limitation and with the date of the launch October 1, 2000 as an example, an orbit was selected with apogee directed to the North Galactic pole at the begining and rotation of orbit plane was maximized. The initial state vector is given in the inertial coordinate system in epoch J2000.0. ... The orbit has initial perigee radius Rp=7000.0 km, initial apogee radius Ra=343000.0 km and initial period T=8.453 days. ...

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... As the list of extra-solar planets orbiting sun-like stars ( exoplanets.org/planet_table.shtml ) continues to grow, more and more members of multiple-planet systems ( exoplanets.org/mult.shtml ) are being discovered. ... A planet doesn't actually orbit a star; rather both orbit a point between the two objects. ... Figure 3-Two planets in orbit around 47-Ursa Majoris produce more complex variations in the Doppler-shift data. ... Could these be examples of "The Music of the NEW Spheres"? ...

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• ASP: A Good Definition of the Word "Planet": Mission Impossible?
• ASP: Monster Comet Promises Big Show
• ASP: Red Rover?s Rocky Road

To achieve its task within the INTERBALL project, the subsatellite must have an orbit close to that of the main satellite and be at a certain distance away from the latter. ... For example, in case of the Tail Probe, to study the fine structure of boundaries between the formations in the interplanetary space (shock waves, magnetopause, magnetic clouds, plasma pistons, etc.) the distance between the subsatellite and the main spacecraft should be in the range of 100-300 km. ...

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• INTERBALL TAIL PROBE SITUATION ANALYSIS
• INTERBALL IB_TAIL last day in the topocentrical c/s of the landing point
• Polar Orbiting Satellites

... Posts tagged ?orbit? ... There is a new report from Bernabei et al. ( arXiv:0804.2741 ) of the direct detection of the effects of Dark Matter that is causing a lot of buzz. ... Tags: arXiv , DAMA , dark matter , Earth , modulation , orbit , scintillation , systematic error , year . Category: arXiv , News | 2 Comments . ... Entries RSS . Comments RSS . ... vlk on [MADS] Parallel Coordinates . upvc windows on [MADS] Parallel Coordinates . ... Entries (RSS) and Comments (RSS) . ...

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• SAO RSDC Home Page

... Data Analysis SAS News What is SAS? ... Size of the visibility bins . ... In order to determine the visibility, the sky is divided into bins of approximately equal solid angle. ... The number of bins per strip is: Strips 0 to 2: 180 bins Strips 3 to 7: 175 bins Strips 8 to 12: 170 bins Strips 13 to 17: 155 bins Strips 18 to 22: 140 bins Strips 23 to 27: 115 bins Strips 28 to 32: 90 bins Strips 33 to 37: 60 bins Strips 38 to 42: 30 bins Strips 43 to 44: 5 bins Strips 45: 1 bin . ...

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• Generation from In-Orbit Data
• xmmtrack: XMM orbit TRACKing

... Science User Portal . ... For the first time, astronomers have been able to directly follow the motion of an exoplanet as it moves from one side of its host star to the other. ... Only 12 million years old, or less than three-thousandths of the age of the Sun, Beta Pictoris is 75% more massive than our parent star. ... This research was presented in a paper to appear this week in Science Express (тАЬA Giant Planet Imaged in the disk of the Young Star Beta Pictoris,тАЭ by A.-M. Lagrange et al.) ...

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• Orbit of the ultra-cool stars in 2MASSW J0746425+2000321 | ESO
• HD 80606: a Giant Planet in an Extremely Elongated Orbit | ESO
• Orbits of the Planets | ESO

Instrument . ... Scanning TV-sensor with on-board data recording system for global coverage mode . ... recording, direct transmission . ... IR-radiometer for global coverage and direct data transmission modes . ... The scientific instrument package onboard the Meteor-3 spacecraft provides for regular instant acquisition of images of cloudiness and Earth surface in visible and infra-red bands, data on air temperature and humidity, sea surface temperature and clouds temperature. ...

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HR 8799: Discovery of a Multi planet Star System . ... NRC Canada Explanation: How common are planetary systems like our own Solar System? In the twelve years previous to 2008, over 300 candidate planetary systems have been found orbiting nearby stars. ... Although the HR 8799 planetary system has significant differences with our Solar System, it is a clear demonstration that complex planetary systems exists, systems that could conceivable contain an Earth-like planet . ...

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• HR 8799: Discovery of a Multi planet Star System
• The Earth Also Rises
• XWare > APOD

... 8, ``Celestial Mechanics'', 2002 Formation and migration of trans -- Neptunian objects S. I. Ipatov 1;2 1 Institute of Applied Mathematics, Moscow, Russia 2 NASA/GSFC, Greenbelt, USA We support the Eneev's idea [1] that the largest (with diameter d?100 km) trans ­ Neptunian objects ( TNOs ) moving now in not very eccentric orbits ... The total amount of water delivered to the Earth during the formation of the giant planets was about the mass of water in the Earth's oceans. ...

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• http://www.ipa.nw.ru/conference/2002/sovet/PS/DESCAM.PS

... Tonight's Sky . ... The Magazine . ... Observing . ... Gravitational wave search provides insights into galaxy evolution and mergers . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Open cluster NGC 2818, spiral galaxy NGC 2964, and spiral galaxy NGC 2976 . ... Astronomy for Kids . ... lunar reconnaissance orbiter . ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ... Astronomy Magazine . ...

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• mars reconnaissance orbiter | Astronomy.com
• Mars orbiter repositioned to phone home Mars landing | Astronomy.com
• Earth spins as it orbits the Sun, and the solar system is orbiting the galactic

Lunar Orbiter 4 . Courtesy of NASA's National Space Science Data Center . ... The Lunar Orbiter 4 spacecraft was designed primarily to photograph smooth areas of the lunar surface for selection and verification of safe landing sites for the Surveyor and Apollo missions. ... This experiment consisted of a dual-lens camera system designed to satisfy the primary mission objective of providing photogaphic information for mapping and for the evaluation of Apollo and Surveyor landing sites. ...

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• Lunar Orbiter 3
• Educator's Guide to Spotting the Shuttle
• Lunar Orbiter 5

... Catalogue . ... Get the data . ... Catalogue description: . ... orbit code (orbit at which the data were transferred to the Earth) . operation mode . d - direct transmission mode, . r - recording mode, . 2 - sounding every 8 sec. during ~33 min. 3 - sounding every 16 sec. during ~120 min. 4 - sounding every 64 sec. during ~1030 min. orbit, date (YYMMDD) and UT (HHMM) of sounding seance beginning. orbit, date (YYMMDD) and UT (HHMM) of sounding seance end. ...

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... 2013 July 1 . Orbiting a Black Hole . ... Explanation: What would it look like to orbit a black hole? ... For another, the sky near the black hole would appear significantly distorted , with more and more images of the entire sky visible increasingly near the black hole. ... Orbiting a black hole, as shown in the above scientifically-accurate computer-created illustrative video, will show stars that pass nearly directly behind the black hole as zipping around rapidly near the Einstein ring. ...

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• APOD: April 22, 1999 - Where is Upsilon Andromedae
• APOD: 2008 November 17 - HR 8799: Discovery of a Multi planet Star System
• APOD: 2000 August 7 - Nearby Star Epsilon Eridani Has a Planet

... ATNF Home . About ATNF . ... About ATNF overview . ... Australia Telescope Steering Committee . ... Australia Telescope User Committee . ... Murchison Radio-astronomy Observatory . ... Parkes radio telescope . Australia Telescope Compact Array . Mopra radio telescope . ... Australia Telescope Online Archive (ATOA) . ... Parkes | ... Australia Telescope 20GHz Survey . ... Visiting Parkes radio telescope . Visiting Australia Telescope Compact Array . ... Parkes radio telescope webcam . ...

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• PPT Slide
• Eccentricities of pulsar orbits
• Binary companions and their orbits

... Bad Astronomy . ... Bitesize Astronomy . ... Have you ever looked at pictures of Saturn's rings and noticed what look like gaps in the rings? ... Gian Domenico Cassini discovered a large gap in Saturn's rings in 1675. Later, an astronomer named Encke discovered a smaller gap near the edge of the rings. ... It was found long ago that an orbit in the Cassini Division, as the large gap is named, has a period almost exactly one-half that of one of Saturn's moons named Mimas. ... 2008 Phil Plait. ...

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• Phil Plait's Bad Astronomy: Bitesize Tour of the Solar System
• Phil Plait's Bad Astronomy: Bad News: Eye in the Sky
• Phil Plait's Bad Astronomy: Misconceptions

... В 1999 г. космическое агентство NASA потеряло два марсианских исследовательских зонда - Mars Climate Orbiter и Mars Polar Lander. В результате работы внутренней комиссии Лаборатории реактивного движения агентства по расследованию причин аварии исследовательского зонда Mars Climate Orbiter было официально признано, что авария эта произошла из-за разнобоя в используемых системах единиц в разных подразделениях, участвовавших в этом проекте. ... другие статьи .. ...

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Arecib o Asteroid Dynamics Workshop SUNDAY evening: Welcome Reception in Library MONDAY morning : Orbits 9:00 9:20 9:40 10:00 Steve Chesley David Nesvorny ґ David Vokrouhlicky ґ Jon Giorgini The First Direct Measurement of Yarkovsky Acceleration on an Asteroid Yarkovsky Effect Measured for Main-Belt Asteroids Next Yarkovsky Candidates Asteroid Orbit Determination and Radar Astrometry: Small Forces and Long-Term Prediction 10:20 11:00 11:20 Coffee ...

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• http://www.naic.edu/~nolan/astdyn/program.ps
• Pulsar Highlights - A Dozen new MSPs in Globular Clusters
• Orbits in the period / acceleration plane