Скачать или смотреть August 18, 1877 – Discovery of Phobos, Martian Moon

On August 18, 1877, Asaph Hall, an American astronomer at the U.S. Naval Observatory, discovered Phobos, the inner and larger of the two natural satellites of Mars. Just six days later, he also identified its smaller companion, Deimos. These discoveries marked a major milestone in planetary astronomy.

Phobos is small, irregularly shaped, and orbits Mars so closely that it rises and sets twice a day. Its mysterious origin—possibly a captured asteroid—continues to intrigue scientists, and it is a subject of interest for future Mars missions due to its proximity and potential as a staging point for exploration.

Hall’s work helped expand our understanding of Mars’ planetary system, and his discovery remains significant in both astronomical history and future space exploration planning.
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