The space telescope's image of a odd-looking spiral galaxy is, in reality, two distant galaxies overlapping each other.

Cosmic rays are particles from outer space that travel across the universe ... (One particular cosmic ray, detected in 1991 and nicknamed the “Oh-My-God particle,” was going very nearly the speed of ...

Especially the latter poses a great challenge for long-term space travel, and so people are working on various concepts to protect astronauts’ DNA from being smashed by cosmic rays. This has ...