A camera affixed to the International Space Station recently spotted some curious symbols amid a barren desert landscape.

Astronomers have found a super-Earth, HD 20794 d, in the habitable zone around a Sun-like star 20 light-years away. With a mass six times that of Earth and a 647-day orbit, it could have ...

HD 20794 d is six times Earth’s mass, orbiting a Sun-like star just 20 light-years away, making it one of the closest habitable-zone exoplanets. First detected in 2022, scientists spent years ...