When Nasa's Juno probe approached Jupiter it caught sight of its four big moons - Callisto, Ganymede, Europa and Io. When Galileo Galilei's discovered these moons in 1610, it marked the birth of ...

Saturn surpasses Jupiter with 128 newly discovered moons, becoming the planet with the most moons in our solar system.

Jupiter's biggest moons, our moon? How did those lucky four come by their atmospheres? It turns out that getting an atmosphere—and holding on to it—really comes down to how big and how close ...

Jupiter’s four largest moons – Io ... circular orbits around the equator. Irregular moons typically orbit in big ovals further away from planets, and at a range of angles.

Out past Neptune are countless small icy and rocky bodies called Trans-Neptunian Objects (TNOs), and many of these have moons as well. While some TNOs could be called dwarf planets because of their ...

James Webb Space Telescope Sees Jupiter's Rings, Moons and Auroras Credit: Space.com | imagery courtesy: NASA, ESA, Jupiter ...

Related: Why NASA's Europa Clipper to Jupiter's icy moon is such a big deal After four months of virtually non-stop testing and analysis, however, the Clipper team determined that the transistors ...

but new research suggests that Jupiter's moon has been spewing lava since the dawn of the solar system, some 4.57 billion years ago. A weekly summary of the big stories from financial markets ...

Jupiter has four large moons – Io, Europa, Ganymede and Callisto – with diameters of more than 3000 kilometres. However, as of April 2023, we know it is also home to 91 additional small satellites.

In March and April 2025, internet users shared a striking image that they claimed showed "Steeple Mountain," a massive point ...

Gigantic Asteroid Impact Shifted the Axis of Solar System's Biggest Moon Sep. 3, 2024 — Around 4 billion years ago, an asteroid hit the Jupiter moon Ganymede. Now, a researcher realized that the ...