To travel between solar systems, a spacecraft would need extremely sophisticated – if not impossible – technology.

Astronomers are baffled by 3I/ATLAS, a newly discovered interstellar object that appears to be defying the basic laws of celestial motion. Instead of drifting naturally through space, the mysterious ...

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 ...