The head of planetary defense at the European Space Agency discusses 2024 YR4, an asteroid with a small chance of striking ...

Researchers believe they have rediscovered a mysterious star system first spotted in 2011. If true, the alien sun and its ...

For most of history, the Moon was regarded as a mysterious and powerful object. Then scientists made it into a destination ...

Photos from Mars have sparked a discussion about mysterious doors on the planet. The images surprised many as the peculiar ...