Ganymede

Pluto was discovered 95 years ago. It has captured imaginations ever since.

NASA's Juno spacecraft has discovered a giant volcanic hot spot on the surface of Jupiter's hellish moon Io. The eruptions in this area are chucking out six times the energy being produced by all Earth's power stations, researchers say.

On a recent flyby, the Juno spacecraft spotted intense volcanic activity on Io, one of Jupiter's moons. It was more extreme than any volcanism ever seen on Io. The post Juno spots most extreme volcanic activity on Io to date first appeared on EarthSky.

Twenty years ago, the Huygens probe achieved humanity's first landing on a moon in the outer solar system when it touched down on Titan.

Pluto may have got romantic to capture its largest moon, colliding and engaging in a passionate but icy 10 hour kiss with Charon billions of years ago.

Charon's formation may have been wildly different from how Earth's moon came to be.

Pluto and Charon may not have formed in a destructive collision like Earth and its moon, but through a newly discovered "kiss and capture" mechanism. The post Kiss and capture: A new explanation for Pluto's largest moon first appeared on EarthSky.

"The most difficult thing to see is what stands right in front of your nose."

Apple's first in-house cellular modem will grace the iPhone SE next year. In 2026, the iPhone 18 series will get an updated version with faster 5G support.

The surface of Europa – one of Jupiter's moons – is a thick layer of solid ice.

NASA's Europa Clipper mission lifted off successfully on Monday, marking the agency's first mission to Jupiter in over a decade. The $5.2 billion spacecraft aims to investigate whether Europa, Jupiter's fourth-largest moon, could harbor conditions suitable for life. A SpaceX Falcon Heavy rocket laun...

A massive NASA spacecraft has set sail for Jupiter and its moon Europa.

Europa Clipper will make a six-year journey to Jupiter to study Europa, an icy-surfaced moon that scientists believe has "ingredients for life."

NASA is about to launch its Europa Clipper mission to the icy moon of Jupiter. Thought to contain an underground ocean and potentially habitable environment, Europa has long been a tantalizing target.

A massive NASA spacecraft is ready to set sail for Jupiter and its moon Europa. The craft...

The Europa Clipper, set for launch in October, will explore a distant ocean world.

NASA's Webb Space Telescope has identified new clues about the surface of Pluto's...

Astronomers using the Keck II 10-m telescope have discovered evidence for an Earth-mass planet and a brown dwarf orbiting a white dwarf star.

Scientists continue to learn new things about the planet, its sweeping rings and its many moons

A new video from an astronaut's vantage point in space captures a bright green burst over Earth as a meteor exploded in the night sky.