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Phobos is named after the Greek god of fear and panic, who is the son of Ares (Mars) and twin brother of Deimos. Phobos is a small, irregularly shaped object with a mean radius of 11 km (7 mi). It orbits 6,000 km (3,700 mi) from the Martian surface, closer to its primary body than any other known natural satellite to a planet.
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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.
The motions of Phobos and Deimos would appear very different from that of Earth's Moon. Speedy Phobos rises in the west, sets in the east, and rises again in just eleven hours, while Deimos, being only just outside synchronous orbit, rises as expected in the east but very slowly. Despite its 30-hour orbit, it takes 2.7 days to set in the west ...
Phobos 2 investigated the Mars surface and atmosphere and returned 37 images of Phobos [3] with a resolution of up to 40 meters. Shortly before the final phase of the mission, during which the spacecraft was to approach within 50 m of Phobos' surface and release two landers (one, a mobile hopper , the other, a stationary platform) contact with ...
The Mars monolith as seen from orbit. The Mars monolith is a rectangular object, possibly a boulder, discovered on the surface of Mars. [1] [2] The Mars Reconnaissance Orbiter took pictures of it from orbit, roughly 180 miles (300 km) away. [1]
Images featured on the Astronomy Picture of the Day (APOD) web site may be copyrighted. The National Space Science Data Center (NSSDC) site has been known to host copyrighted content. Its photo gallery FAQ states that all of the images in the photo gallery are in the public domain "Unless otherwise noted."
Phobos 2 operated nominally throughout its cruise and Mars orbital insertion phases on January 29, 1989, gathering data on the Sun, the interplanetary medium, Mars, and Phobos. Phobos 2 investigated Mars's surface and atmosphere and returned 37 images of Phobos [4] with a resolution of up to 40 meters. Communications were lost before planned ...