Spacecraft exploring the vast extent of the cosmos have made significant observations about the gas giants Jupiter and Saturn. Despite being similar in many ways, observations have revealed mystifying ...

The largest moon of Saturn is bigger than Mercury, yet for all its conspicuousness, scientists don't know exactly how it came ...

For decades, astronomers have debated the mystery at the heart of Jupiter, the largest planet in our solar system. Many believed that a colossal collision with an early planetary body must have ...

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. NASA's Hubble Space Telescope took this image of Saturn on ...