A Mars aircraft is a vehicle capable of sustaining powered flight in the atmosphere of Mars. So far, the Mars helicopter Ingenuity is the only object to ever fly on Mars, completing 39 successful flights covering 7.90 km in 1 hour, 4 minutes and 20 seconds of flight time. It made the first powered flight on 19 April 2021, taking off from the surface. Previously, the experimental aircraft, NASA Mini-Sniffer, was considered for possible missions to fly in and study Mars' atmosphere, but that idea was abandoned. Aircraft may provide on site measurements of the atmosphere of Mars, as well as additional observations over extended areas. A long-term goal is to develop piloted Mars aircraft. Compared to Earth, the air on Mars is much thinner at the surface, with pressure less than 1% of Earth's at sea level, requiring a more efficient method to achieve lift.