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Phobos (/ ˈ f oʊ b ə s /; systematic designation: Mars I) is the innermost and larger of the two natural satellites of Mars, the other being Deimos.The two moons were discovered in 1877 by American astronomer Asaph Hall.
Both sets of findings support an origin of Phobos from material ejected by an impact on Mars that reaccreted in Martian orbit, [40] similar to the prevailing theory for the origin of Earth's moon. The moons of Mars may have started with a huge collision with a protoplanet one third the mass of Mars that formed a ring around Mars.
Martian Moons eXploration (MMX) is a robotic space probe set for launch in 2026 to bring back the first samples from Mars' largest moon Phobos. [3] [5] Developed by the Japan Aerospace Exploration Agency and announced on 9 June 2015, MMX will land and collect samples from Phobos once or twice, along with conducting Deimos flyby observations and monitoring Mars's climate.
As Phobos, one of Mars’ two moons, passed in front of the sun, it cast a lumpy, potato-shaped shadow on the sun’s face as well as on the Martian surface. The Perseverance rover, ...
The Martian moon Phobos, roughly 17 miles across, is marred by the massive Stickney crater, which takes up almost half of its surface. The rubbly moon can “fall apart due to stress at any time ...
Mars may have had a single moon before something smashed into it, tearing it asunder into the two moons we see today. In a study published Monday in Nature, scientists explained how they used the ...
The Phobos monolith (right of center, casting long shadow) as taken by the Mars Global Surveyor (MOC Image 55103, 1998). The location of the monolith (HiRISE image PIA10368) The Phobos monolith is a large rock on the surface of Mars' moon Phobos. [1] It is a boulder, about 85 m (279 ft) across and 90 m (300 ft) tall.
Both are bound for the Martian moon Phobos and are scheduled to arrive in September of 2012, whereupon Yinghuo-1 will be dispatched into orbit around Mars and Phobos-Grunt will begin maneuvering ...