Jupiter's moon Io (left side of image) is connected to Jupiter (right side of image) through the planet's magnetic field. Juno's close flyby of Io revealed electrons with varying properties in the ...

Jupiter’s moon Io, the most volcanically active body in the solar system, is littered with hundreds of erupting volcanoes. High-resolution images now reveal several dozen lava lakes, researchers ...

Plus: Observe two stunning spirals, see Venus reappear as a morning star, and enjoy the Last Quarter Moon in the sky this ...

Earlier this week, Saturn gained a whopping 128 new official moons, as the International Astronomical Union recognised ...

Io’s long-debated magma ocean may not exist. Juno spacecraft data reveals that tidal forces deform the moon differently than expected if a magma ocean were present. Instead, Io’s mantle appears mostly ...

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

Plus: A solar eclipse and an occultation of the Pleiades as our satellite skims through several constellations in the sky ...

The number of known moons in our Solar System has been rising for centuries, but astronomers say it has probably peaked – for ...

NASA's Voyager 1 spacecraft discovered active volcanoes on Jupiter's moon Io. Before Voyager 1 flew by Io, scientists believed the moon to be a dead world much like Earth's moon. The mission ...