Getting a spacecraft to Mars or beyond requires an enormous amount of fuel, most of which has to be hauled from Earth, adding to the overall cost and weight of the spacecraft. NASA has been working on ...

Rockets have defined space travel for decades, but they are not the only possible way to reach orbit. Scientists and engineers have explored alternative ideas that could bypass the limits of ...

Editor’s note, April 7, 2026, 5:10 pm ET: The Artemis II mission is conducting experiments that may radically advance our understanding of space medicine. The findings of A Virtual Astronaut Tissue ...