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'''Mars''' is the fourth planet from the [[Sun]], after [[Mercury]], [[Venus]], and [[Earth]]. It is called "The Red Planet" because it looks red from Earth.  

'''Mars''' is the fourth planet from the [[Sun]], after [[Mercury]], [[Venus]], and [[Earth]]. It is called "The Red Planet" because it looks red from Earth.  

Mars was known to the antiquities; the Romans even named one of their gods — [[Ares|Mars, the god of war]] — after it. The Romans also knew about Jupiter and Saturn, but it was not until the 17th century that [[William Herschel]] discovered [[Uranus]], and [[Neptune]] and [[Pluto]] took even longer.

The planet has been known since Antiquity. Because of this, the planet was named after the Roman equivalent of [[Ares]], the Greek god of [[war]].

Mars has two moons:  Phobos and Deimos (which respectively mean "Fear and "Panic" in [[Greek]]). Russian scientists in the 1950s posited that Phobos might be hollow, but these claims were discredited in the late 1960s.

Mars has two moons:  Phobos and Deimos (which respectively mean "Fear and "Panic" in [[Greek]]). Russian scientists in the 1950s posited that Phobos might be hollow, but these claims were discredited in the late 1960s.