Explanation: Hurtling through space above the Red Planet, potato-shaped Phobos completes an orbit of Mars in less than eight hours. In fact, since its orbital period is shorter than the planet's rotation period, Mars-based observers see Phobos rise in the west and set in the east - traveling from horizon to horizon in about 5 1/2 hours. These three images from the Mars Global Surveyor (MGS) spacecraft record the oval shadow of Phobos racing over western Xanthe Terra on August 26, 1999. The area imaged is about 250 kilometers across and is seen in panels from left to right as red filter, blue filter, and combined color composite views from the MGS wide-angle camera system. The three dark spots most easily seen in the red image are likely small fields of dark sand dunes on crater floors. Standing in the shadow of Phobos, you would see the Martian version of a solar eclipse!

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Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (USRA)
NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.

Publikacii s klyuchevymi slovami: Mars - Phobos - Martian moon - Mars - Fobos - sputniki planet Publikacii so slovami: Mars - Phobos - Martian moon - Mars - Fobos - sputniki planet
Sm. takzhe: Mesto posadki "Ares-3" Fobos: sputnik nad Marsom Sputnik Marsa zatmevaet sputnik Marsa Ten' povrezhdennoi lopasti vinta "Indzhen'yuiti" Marsianskii pylevoi smerch prohodit mimo Mars s vysoty v pyat' metrov Fobos nad Marsom Vse publikacii na tu zhe temu >>