A visitor is hurtling through the void, a silent, ancient vagabond from an alien star system, and by the end of the week, it will make its closest ever approach to Earth. This is no ordinary comet; it ...

Grain-sized remnants of alien technology may get caught in solar wind and land on plants and moons close to us ...

NASA and the European Space Agency announced Monday that the James Webb Space Telescope has produced the first mid-infrared chemical fingerprint ever obtained from an interstellar object, detecting ...