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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.
Asaph Hall discovered Deimos on 12 August 1877 at about 07:48 UTC and Phobos on 18 August 1877, at the US Naval Observatory (the Old Naval Observatory in Foggy Bottom) in Washington, D.C., at about 09:14 GMT (contemporary sources, using the pre-1925 astronomical convention that began the day at noon, [16] give the time of discovery as 11 August ...
Asaph Hall III (October 15, 1829 – November 22, 1907) was an American astronomer who is best known for having discovered the two moons of Mars, Deimos and Phobos, in 1877. [1] He determined the orbits of satellites of other planets and of double stars, the rotation of Saturn, and the mass of Mars.
Did not reach the Moon as intended, but discovered a second radiation belt around Earth. [2] 5.9 kg (13.0 lb) 1959 January 2 Soviet Union: Luna 1: Luna: Partial success: The first spacecraft to reach the vicinity of the Moon, and the first spacecraft to be placed in heliocentric orbit. 361 kg (794.2 lb) February 17 US: Vanguard 2E: Vanguard SLV ...
Surfers beware: Bearded fireworms, caterpillarlike critters that look like they are straight out of a horror movie are lurking in the sand on Texas beaches. " Your worst nightmares are washing up ...
The political beltway over the weekend was upended by a bombshell report that Texas Rep. Kay Granger had been absent from the public eye for nearly six months, only to be discovered at an ...
The Living Interplanetary Flight Experiment [2] (LIFE or Phobos LIFE [3]) was an interplanetary mission developed by the Planetary Society. It consisted of sending selected microorganisms on a three-year interplanetary round-trip in a small capsule aboard the Russian Fobos-Grunt spacecraft in 2011, which was a failed sample-return mission to ...
Human remains have been found in an advanced state of decomposition near the residence of a Texas A&M student who disappeared months ago. Caleb Harris was last seen near his apartment complex off ...