Detailed image shows volcanoes on Io's surface

Solar System

NASA's Juno Mission Makes Closest Flyby Past Io

Juno has revealed Jupiter's volcanic moon Io as never before.

Io, as imaged by Juno

Solar System

Striking New Views of Jupiter and Its Moon Io

The James Webb Space Telescope and Juno mission turned their eyes to Jupiter and its volcanic moon Io, revealing fine details.

bands of red rocks on a red planet

Space Missions

New Photos from NASA's Perseverance and Juno

NASA spacecraft are constantly sending back images from across the solar system. Here are two that caught our eye.

Jupiter, Ganymede, Europa and double shadows, March 25, 2019

Solar System

Astronomers Find a Dozen More Moons for Jupiter

The discovery of a dozen new moons for Jupiter makes the king of planets the king of moons, too — at least for now.

Pandora

Solar System

The Moons of the Solar System

Not so long ago, astronomers thought only a few dozen moons orbited the planets of our solar system. Today, the total count tops 170!

Jupiter, Ganymede, Europa and double shadows, March 25, 2019

Solar System

Amateur Astronomer Discovers New Moon of Jupiter

An amateur astronomer has discovered a new moon of Jupiter. While it hasn't received official designation yet, it would bring the tally of Jovian satellites to 80.

Lost Jovian moon J 23

Solar System

Amateur Astronomer Finds “Lost” Moons of Jupiter

An amateur astronomer has recovered four of five "lost" Jovian moons.

Valetudo image animation

Solar System

Jupiter's Moons: 10 More Found, 79 Known

Over the past 18 months, astronomers have painstakingly tracked a dozen tiny moons that they found circling the giant planet Jupiter.

Europa's amazing surface

Solar System

Why Are the Galilean Moons So Massive?

Scientists propose that Saturn’s meddling helped create the four giant Galilean moons orbiting Jupiter.

Discovery images for S/2017 J 1

Solar System

Two New Satellites for Jupiter

Just a mile across, a pair of moonlets found orbiting Jupiter bring the planet's total satellite count to 69.