Within the next 15 years, NASA, China, and SpaceX plan to send the first crewed missions to Mars. In all three cases, these missions are meant to culminate in the creation of surface habitats that ...

To this end, the defence research organisation has launched the Principles of Undersea Magnetohydrodynamic Pumps (PUMP) programme, a 42-month effort aiming to build on the success of MHD at small ...

Almost all satellites have some kind of thrusters aboard, but they tend to use them as little as possible to conserve chemical fuel. Reaction wheels are one way to make orientation adjustments without ...

Abstract: Proposed missions such as a Mars sample return mission and a human mission to Mars require landed payload masses in excess of any previous Mars mission. Whether human or robotic, these ...

KOBE, JAPAN — In the beginning was the oar, a crucial if low-tech invention that served as the prime engine of naval propulsion for uncounted millennia. The next great advance was the sail, the ...

Abstract: Proposed missions such as a Mars sample return mission and a human mission to Mars require landed payload masses in excess of any previous Mars mission. Whether human or robotic, these ...