Opportunity
Opportunity was a NASA Mars rover, part of the Mars Exploration Rover mission, that landed in Meridiani Planum on January 25, 2004. Originally designed for a 90‑sol mission, it operated for nearly 15 years—more than 5,000 sols—traversing over 45 km and providing strong evidence that Mars once held liquid water. It ceased communications after a global dust storm in June 2018 and was declared complete in February 2019.
Source: science.nasa.gov
APODs including "Opportunity"
Rolling Across the Rocky Plains of Mars
04/10/2010
You stare out across the rocky plains of Mars. Before you, in every direction, is dark sand and bright rock. Although little has changed here for millions of years, no one has ever seen this view before. You are being sent on a long journey to a distant crater, the largest crater in the region. Your human overlords back on planet Earth wonder if the impact that created this distant crater might have also uncovered unique clues to the distant past of Earth's neighboring planet, clues that might reveal if life ever existed here. Breaking the monotony, visible toward the image center, an unusual rock sticks out from the landscape. Quite possibly, this rock is not from this world, and you divert to inspect it. You are the robotic Opportunity rover, and you are the eyes for countless humans following your trek back on planet Earth. Rolling about a football field a day, you might reach Endeavour crater sometime in 2012. If you survive.