radio occultations

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• Radio clock — A radio clock is a clock that is synchronized by a time code bit stream transmitted by a radio transmitter connected to a time standard such as an atomic clock. Such a clock may be synchronized to the time sent by a single transmitter, such as… …   Wikipedia

• Cassini–Huygens — Artist s concept of Cassini s Saturn Orbit Insertion Operator NASA / ESA / ASI Mission type …   Wikipedia

• Europa (moon) — Europa Europa s trailing hemisphere in approximate natural color. The prominent crater in the lower right is Pwyll and the darker regions are areas where Europa s primarily water ice surface has a higher mineral content. Imaged on September 7,… …   Wikipedia

• Venera 9 — Infobox Spacecraft Name = Venera 9 Caption = Venera 9 orbiter Organization = USSR Major Contractors = Mission Type = Orbiter and Lander Satellite Of = Venus Orbital Insertion Date = October 20, 1975 Launch = June 8, 1975 Launch Vehicle = Proton… …   Wikipedia

• Venera 10 — Infobox Spacecraft Name = Venera 10 Caption = Venera 10 orbiter Organization = USSR Major Contractors = Mission Type = Orbiter and Lander Satellite Of = Venus Orbital Insertion Date = October 23, 1975 Launch = May 14, 1975 Launch Vehicle = Proton …   Wikipedia

• Atmosphère d'Europe — Pour les articles homonymes, voir Atmosphère. Atmosphère d’Europe Une des faces de la lune galiléenne, Europe …   Wikipédia en Français

• Европа (спутник) — У этого термина существуют и другие значения, см. Европа (значения). Европа …   Википедия

• Occultation — See also: Occult (disambiguation) In this July 1997 still frame captured from video, the bright star Aldebaran has just reappeared on the dark limb of the waning crescent moon in this predawn occultation. An occultation is an event that occurs… …   Wikipedia

• eclipse — eclipser, n. /i klips /, n., v., eclipsed, eclipsing. n. 1. Astron. a. the obscuration of the light of the moon by the intervention of the earth between it and the sun (lunar eclipse) or the obscuration of the light of the sun by the intervention …   Universalium

• PLANÈTES — Bien avant que des satellites artificiels gravitent autour de la Terre, les chercheurs avaient compris l’intérêt que ceux ci présenteraient pour la connaissance de l’environnement de notre planète. Les années qui ont suivi la mise en orbite du… …   Encyclopédie Universelle

• Anneaux d'Uranus — Schéma du système d’anneaux et de lunes d’Uranus. Les lignes continues montrent les anneaux, les lignes en pointillés, les orbites des lunes. Les anneaux d’Uranus sont un système d’anneaux de la planète Uranus, moins complexes que les anneaux de… …   Wikipédia en Français