... Mars is the fourth from the Sun big planet of the Solar system. ... Once a 15 - 17 years occures so-called the great opposition when the planets come nearer about 56 billions km. ... The new level of Mars investigation began in 1965 when the spaceships were used to fly round the Mars and from 1971 landed on the planet. ... The investigations of Mars showes the traces of vulcanization on this planet: the splits and rawins sometimes hundred kilometers long. ... Mars's atmosphere and the water. ...