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Formation & composition
The examination of Phobos and its companion revealed more than their odd, non-spherical shapes. The two moons are dark gray in color, and heavily cratered. The moons are some of the darkest, least reflective objects in the solar system.
After observing the pair, scientists concluded that they were made of material similar to Type I or II carbonaceous chondrites, the material that makes up asteroids and dwarf planets.
The composition and odd shape led some scientists to conclude that Phobos and Deimos came from the asteroid belt, with Jupiter's gravity long ago nudging them into orbit around Mars.
However, scientists aren't certain that the asteroid belt is the source of the moons' birth. Both have a nearly circular orbit unusual for captured objects. The thin atmosphere of Mars would have a hard time providing the necessary braking to settle the pair into their present-day orbits. Similarly, the moons are not as dense as objects in the asteroid belt.
On July 1988, the Russians launched two unmanned satellite probes - Phobos 1 and phobos 2 - in the direction of Mars, and with the primary intention of investigating the planet's mysterious moon, Phobos. Phobos 1 was unfortunately lost en route two months later, reportedly because of a radio command error. Phobos 2 was also ultimately lost in the most intriguing circumstances, but not before it had beamed back certain images and information from the planet Mars itself.
Phobos 2 arrived safely at Mars in January 1989 and entered into and orbit around Mars as the first step at its destination towards its ultimate goal: to transfer to an orbit that the would make it fly almost in tandem with the Martian moonlet called Phobos (hence the spacecrafts name) and explore the moonlet with highly sophisticated equipment that included two packages of instruments to be placed on the moonlet's surface. All went well until Phobos aligned itself with Phobos, the Martian moonlet. Then, on 28th March, the Soviet mission control centre acknowledged sudden communication "problems" with the spacecraft; and Tass the, the official Soviet news agency, reported that "Phobos 2 had failed to communicate with Earth as scheduled after completing an operation yesterday around the Martian moon Phobos. Scientists at mission control have been unable to establish stable radio contact."
Named after the Greek mythological twin characters Phobos (panic/fear) and Deimos (terror/dread) who accompanied their father Ares, god of war, into battle. Ares was known as Mars to the Romans.
originally posted by: GBP/JPY
Dude.....it's actually the. Crux of the ....biscuit......
Russia and the US couldn't get a ship there those days
Was it Mariner 2...... sent pics as it approached Marsl then the pics,had a shadow showing, next pic the shodow engulfed....as if coming from an object behind......
Then, on national tv............zip........never heard from again.......same on Mariner 3, I think 3.....had a loss at landing.
The Phobos monolith is a large rock on the surface of Mars's moon Phobos. It is a boulder about 85 m (279 ft) across and 90 m (300 ft) tall. A monolith is a geological feature consisting of a single massive piece of rock. Monoliths also occur naturally on Earth, but it has been suggested that the Phobos monolith may be a piece of impact ejecta. The monolith is a bright object near Stickney crater, described as a "building sized" boulder, which casts a prominent shadow.
The Mars monolith is a rectangular object (possibly a boulder) discovered on the surface of Mars. It is located near the bottom of a cliff, from which it likely fell. The Mars Reconnaissance Orbiter took pictures of it from orbit, roughly 180 miles (300 km) away. It is estimated to measure about 5 meters wide.