Voyager 1 is on a journey that will outlast civilizations, outlive the Sun’s familiar neighborhood, and eventually drift into ...

The curious minds at What If explore the possibility of an alien civilization existing on Proxima b, imagining how they might live, communicate, and interact with humanity. Iran makes new offer on ...

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

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 ...

Laser sail propulsion is an idea that won't go away. By aiming powerful Earth-based lasers at tiny spacecraft with light sails, tiny spacecraft can be accelerated to near-relativistic speeds without ...