As we humans grapple with the possibility (or impossibility) of extraterrestrials visiting Earth, NASA has essentially been doing the same thing on other planets for decades now. Take nearby neighbor Mars, for example.
https://www.techspot.com/news/90906-nasa-mars-curiosity-rover-shares-new-panorama-climbs.html?utm_source=dlvr.it&utm_medium=blogger
https://www.techspot.com/news/90906-nasa-mars-curiosity-rover-shares-new-panorama-climbs.html?utm_source=dlvr.it&utm_medium=blogger