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

Io is an incredibly active and extreme place, with glistening lava lakes and volcanic eruptions shooting sulfur and magma to ...

For instance, the Hubble Space Telescope entered safe mode relatively recently as scientists worked on remedying some ...

Catch two transits of Io, spot sparkling star clusters, and view Mars at aphelion while the April Full Moon lights the sky ...

Jupiter’s four largest moons – Io, Europa, Ganymede and Callisto – were the first ever discovered orbiting another planet. They were spotted by Galileo Galilei more than 400 years ago ...

Credit: Astronomy: Roen Kelly Jupiter’s Galilean moons continue performing, orbiting the planet in periods ranging from two to 17 days. The inner three, Io, Europa, and Ganymede, have resonant ...

Juno is scheduled for an upcoming flyby of Jupiter on May 7, during which it is set to carry out a close approach of the ...

with more confirmed moons than all of the other planets combined. But it hasn’t always been this way. Jupiter’s four largest moons – Io, Europa, Ganymede and Callisto – were the first ever discovered ...