what space probes have visited venus
The first successful flyby of Venus was performed by NASAâs Mariner 2 spacecraft on 14 December 1962, following failed attempts by both the Soviet Union and the USA. The first successful landing was the Soviet Venera 4 lander, which touched down on the surface on 18 October 1967.
A space probe is a spacecraft which travels into space with no people in it, usually in order to study the planets and send information about them back to earth. Its rings were discovered by telescope from Earth, but space probes later found that spectacular rings surround some other planets. The Pioneer probes have on board ultra-violet instruments which are measuring light that we can't measure on the earth.