When will man land on another planet?

Man on a planet -  is no definite date can be given for man's first landing on another planet, but it is not expected until after the next decade. The first planet to be visited is likely to be Mars. Venus, the nearest to earth, is too inhospitable, for it is en­veloped in gases and has a surface temperature of about 900° Centi­grade (1,650° Fahrenheit).

Already much effort has been devoted to finding out the condi­tions which would have to be overcome on a planetary journey. The Russians have organized "sampler" expeditions with un­manned, radio-controlled space vehicles. At the same time Ameri­cans aboard the "sky laboratory" in orbit round the earth have con­centrated on the problems of enduring long periods of space travel.