Phobos and Deimos – these names from Greek mythology were given to the moons of our neighbouring planet Mars, discovered in 1877 by the US astronomer Asaph Hall. Besides Earth's Moon, they are the ...

Named after the god of fear and panic in Greek mythology by astronomer Asaph Hall in 1877, Phobos is about 157 times smaller in diameter than Earth’s moon, and is only about 17 miles (27 ...

Deimos was discovered on 11 August 1877 by astronomer Asaph Hall, who gave the moon its name. 3. It's tidally locked to Mars Deimos rotates in exactly the same time as it takes to orbit Mars ...