NASA Associate Administrator Jim Free retires after 30+ years, leaving a legacy of leadership in space exploration.

Callisto, the third largest moon in the entire solar system, orbits Jupiter from about 1.2 million miles away. The rocky ...

NASA’s Europa Clipper mission is on its way to Jupiter’s icy moon, Europa, in search of alien life. Discover the cutting-edge engineering, from its radiation-proof Vault to its magnetic field sensors, ...

NASA Associate Administrator Jim Free announced Wednesday his retirement, effective Saturday, Feb. 22. As associate ...

Official portrait of NASA Associate Administrator Jim Free, taken on Nov. 22, 2024, at the agency's headquarters in ...

It was a history making launch -- when NASA’s Europa Clipper embarked on its long five-year voyage to Jupiter. The $5 billion ...

NASA Juno mission captured amazing new imagery of Jupiter's moon Europa. The spacecraft flew about 219 miles (352 kilometers) ...

Io, Europa, and Ganymede offer a fascinating glimpse into the Jupiter system. Continued exploration will unveil more secrets about these eni ...

More pocked with craters than any other object in our solar system, Jupiter's outermost and second-biggest Galilean moon, Callisto, appears geologically unremarkable. In the 1990s, however, NASA's ...

Astronomers are using the NASA's Hubble Telescope to study auroras — stunning light shows in a planet’s atmosphere — on the poles of the largest planet in the solar system, Jupiter. This animation ...

Scientists are studying Saturn's moon Titan to assess its tidal dissipation rate, the energy lost as it orbits the ringed planet with its massive gravitational force. Understanding tidal dissipation ...

NASA has worked on its own first contact protocols, conducting a 2024 workshop event about how best to communicate the ...