When did the Mariner 9 first craft to orbit another planet Mars?

Mariner 9 became the first spacecraft to orbit another planet, Mars, on November 14, 1971. It was launched by NASA on May 30, 1971, and successfully entered Mars' orbit after a journey of about 167 days. The mission provided groundbreaking data and images of the Martian surface, revealing features like volcanoes, canyons, and evidence of past water flow.