Asaph Hall Jr.
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Asaph Hall IV, known as Asaph Hall Jr., was an American astronomer. He was the son of Asaph Hall, who discovered the moons of the planet Mars. One of his brothers was Percival Hall.
Hall from the 1902 Michiganensian
Hall's childhood home, in the Georgetown neighborhood of Washington, D.C. Note his mother Angeline on front steps, and two Black workers. The house later served as the parsonage and fellowship hall of Alexander Memorial Baptist Church.
Phobos (moon)
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Phobos 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. Phobos is named after the Gre
A composite image of Phobos captured by the Mars Reconnaissance Orbiter in 2008
Deimos and Phobos as seen from Mars, compared in apparent size to the Moon as seen from Earth
An artist's concept of Martian Moons eXploration spacecraft
The Phobos monolith (right of center) as taken by the Mars Global Surveyor (MOC Image 55103, 1998)