Recent flybys of the fiery world refute a leading theory of its inner structure — and reveal how little is understood about ...

A major scientific breakthrough has settled a decades-old debate about the moon’s interior. Researchers have confirmed that the moon has a solid inner core ... piece to the puzzle of lunar ...

In March and April 2025, internet users shared a striking image that they claimed showed "Steeple Mountain," a massive point of interest on Jupiter's moon Io. NASA Jet Propulsion Laboratory ...