Schroeder C (2015) Opportunity of a lifetime: NASA's 4,000 days roving Mars. The Conversation. 05.05.2015.
First paragraph: NASA’s exploration rover Opportunity landed on Mars more than 11 years ago, in January 2004, with what then seemed like ambitious goals: to survive 90 Martian days and drive 600 metres. Opportunity has since driven the first off-Earth marathon (42.2 kilometres, or just over 26 miles) and just passed through its 4,000th Martian day – known as a sol on the Red Planet, lasting 40 minutes longer than on Earth.
Mars; Curiosity; Opportunity rover
|Publication date online||31/05/2015|
|Publisher||The Conversation Trust|
|Place of publication||London|