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Phobos was discovered on Aug. 17, 1877 by Asaph Hall. Hall named Mars' moons for the mythological sons of Ares, the Greek counterpart of the Roman god, Mars. Phobos means fear, and is the brother of Deimos.
Phobos was discovered by the American astronomer Asaph Hall on 18 August 1877 at the United States Naval Observatory in Washington, D.C., at about 09:14 Greenwich Mean Time.
Both were discovered by American astronomer Asaph Hall in August 1877 [3] and are named after the Greek mythological twin characters Phobos (fear and panic) and Deimos (terror and dread) who accompanied their father Ares (Mars in Roman mythology, hence the name of the planet) into battle.
August 17, 2024. Asaph Hall discovered Phobos on August 17, 1877. This image of the large crater Stickney on the Martian moon Phobos is color-enhanced. The crater is 5.6 miles (9 km)...
Phobos, the inner and larger of Mars’s two moons. It was discovered telescopically with its companion moon, Deimos, by the American astronomer Asaph Hall in 1877 and named for one of the sons of Ares, the Greek counterpart of the Roman god Mars.
Phobos was discovered on Aug. 17, 1877 by Asaph Hall. Overview. Phobos, gouged and nearly shattered by a giant impact crater and beaten by thousands of meteorite impacts, is on a collision course with Mars. Phobos is the larger of Mars' two moons and is 17 x 14 x 11 miles (27 by 22 by 18 kilometers) in diameter.
Ninety-four years later, NASA's Mariner 9 spacecraft got a much better look at the two moons from its orbit around Mars. The dominant feature on Phobos, it found, was a crater six miles (10 kilometers) wide—nearly half the width of the moon itself. It was given Angelina's maiden name: Stickney.
The next night, Aug. 12, 1877, he discovered the moon that would later be known as Deimos. Six days later, he found Phobos as well. The two moons lay so close to the planet that they were...
Mars has two moons, Phobos and Deimos. Both are thought to be captured asteroids, or debris from early in the formation of our solar system. Phobos is the larger of Mars' two moons.
How was Phobos discovered? Asaph Hall discovered Phobos in the United States Naval Observatory in Washington DC. It was found six days after its smaller sibling Deimos was found.