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

Researchers believe micrometeorites striking Mars' moons, Phobos and Deimos, may throw dust particles into space.

From Science Daily • May 11, 2026

The spacecraft will spend three years around Mars conducting science operations to observe Phobos and Deimos.

From Salon • Dec. 29, 2023

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

Following the Phobos failure, space officials talked about conducting a thorough revision of the lunar spacecraft design to avoid using similar substandard components.

From Seattle Times • Aug. 22, 2023

So working out longitude requires Phobos to set, and working out latitude requires it to be night so I can sight Deneb.

From "The Martian" by Andy Weir