What planets did Yuri Gagarin visit?

Yuri Gagarin made his one and only space flight in 1961. He was launched from Russia,

made a single orbit of the earth, and landed 1hour and 48minutes after launch. He never

came in contact with any object in the solar system other than the earth.

But that shouldn't be a big disappointment. As of April 2010, No human being has ever yet

'visited' any planet other than the earth.