1. INTRODUCTION
#Question: How many moons does Mars have?
According to the Official NASA website, Mars has two moons: Phobos and Deimos.
They were discovered in August 1877 by Asaph Hall and named after the two sons of Ares (Mars in the roman mythology).
2. MARS MOONS (2)
2.1. Phobos

Phobos, innermost and larger of the two natural satellites of Mars.
2.2. Deimos

Deimos, smaller and outer of the two natural satellites of Mars.
3. MORE INFORMATION AND REFERENCES
- NASA (2019). Nasa Science > Solar System Exploration > Moons > Mars. Avaliable [HERE].
- USGS (1980). Image of Mars. Retrieved from Wikimedia Commons. Avaliable [HERE].
- NASA (1978). Imagen of Phobos (moon of Mars). Avaliable [HERE].
- NASA (2009). Image of Deimos (moon of Mars). Avaliable [HERE].
why
There isn’t an specific reason why Mars has two moons.