3I/ATLAS shows signs of alien engine and non-gravitational acceleration as it passes near the Sun, drawing global attention from scientists and space agencies. Harvard astrophysicist Avi Loeb ...

An interstellar object roughly the size of Manhattan has captured scientists’ attention — and one prominent Harvard astrophysicist believes it could be something far beyond natural. According to the ...

An alien expert believes that aliens could be 'revving the engine' of an infamous interstellar object that could be heading our way in what he describes as "non-gravitational acceleration". Harvard ...

To assess the plausibility of alien visitors, it’s necessary to understand the obstacles that an extraterrestrial vessel would need to overcome to reach Earth ...

COLUMBUS, Ohio – New developments in nuclear thermal propulsion technologies may soon enable advanced space missions to the farthest reaches of the solar system. Leading these advances are researchers ...

Scientists and engineers are diligently working on innovative concepts to make the next era of human spaceflight more powerful and more efficient using nuclear propulsion. One of these designs, known ...