Asaph Hall

Rarity: Rare

A topic known well beyond its field, found in many languages.

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At a glance

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Science and technology

Knowledge cost

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What Wikipedia says

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. He determined the orbits of satellites of other planets and of double stars, the rotation of Saturn, and the mass of Mars.

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