Hall named the moons for the mythological sons of Ares, the Greek counterpart of the Roman god, Mars. Phobos means fear or panic (think "phobia"), and Deimos means flight (as in running away after an overwhelming defeat). Fitting names for the sons of a war god.
Aug 30, 2014 ... 1877: Asaph Hall discovers the two moons of Mars, Phobos and Deimos. 1965: NASA's Mariner 4 sends back 22 photos of Mars, the world's ...
Phobos has only 1/1000th as much gravitational pull as Earth . A 150-pound (68 kg) person would weigh two ounces (68 grams) there. Yet NASA's Mars Globul surveyor has shown evidence of landslides, and of boulders and dust that fell back down to the surface after being blasted off the moon by meteorites.
Date/s of discoverise
- 1965: NASA's Mariner 4 sends back 22 photos of Mars, the world's first close-up photos of a planet beyond Earth.
- 1976: Viking 1 and 2 land on the surface of Mars.
- 1997: Mars Pathfinder lands and dispatches Sojourner, the first wheeled rover to explore the surface of another planet.