Phobos

American  

[foh-buhs, -bos] / ˈfoʊ bəs, -bɒs /

noun

1. Classical Mythology. Also Phobus a son and attendant of Ares and the personification of a fear held to possess armies and cause their defeat.

2. Astronomy. one of the two moons of Mars.

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Phobos British  

/ ˈfəʊbɒs /

noun

1. the larger of the two satellites of Mars and the closer to the planet. Approximate diameter (although it has an irregular shape): 23 km Compare Deimos

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Phobos Scientific  

/ fō′bəs /

1. The larger and inner of the two planetary satellites of Mars.

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Example Sentences

See Examples For:

Phobos

The development of the spacecraft's landing legs was particularly difficult as gravity on Phobos is extremely low, according to Akinari Uehara, a Mitsubishi Electric engineer.

From Barron's ● Aug. 16, 2026

The distant detections of Phobos and Deimos served as a rehearsal for the mission's future search for small moons around asteroid Psyche.

From Science Daily ● Jul. 28, 2026

While Earth’s Moon has many visitors – big and small, robotic and crewed – planned for 2024, Mars’ moons Phobos and Deimos will soon be getting a visitor as well.

From Salon ● Dec. 29, 2023

A second liquid layer inside the planet also meshes better with other evidence, such as how Mars responds to being deformed by the gravitational tug of its moon Phobos.

From Scientific American ● Nov. 1, 2023

Schiaparelli is almost due east, and if my sextant and Phobos calculations are correct, I've got another 1030 kilometers to get there.

From "The Martian" by Andy Weir