This Neptune-sized object would be the first moon discovered to orbit a planet outside the solar system, provided that additional observations continue to support the claim.
moons
Posted inResearch Spotlights
How Jupiter’s Icy Moons Got Their Bands and Grooves
Europa’s churning ice crust could reveal signs of ocean life, new study suggests.
Posted inNews
Ten New Moons Discovered Around Jupiter
The newly plotted moons of Jupiter include one “oddball” that orbits in the wrong direction and may be the remnant of a head-on collision.
Posted inNews
Four Planetary Landscapes That Scientists Can’t Explain
These are just a handful of the hundreds of mysterious features across our solar neighborhood that beg to be studied closer.
Posted inEditors' Vox
Cassini’s Legacy in Print
With over 750 papers published in AGU journals based on Cassini-Huygens mission data, three editors select some of the most noteworthy.
Posted inNews
Iapetus's Ridge: The Result of Many Small Impacts?
A ridge around Saturn's third-largest moon has scientists scratching their heads.
Posted inNews
New Images of Pan, Saturn's Walnut Moon, in Unprecedented Detail
The finely detailed images can help future scientists study small bodies with weak gravity.
Posted inNews
Scientists Solve Charon's Red Mystery
Why are Charon's poles dusted with reddish material?
Posted inEditors' Vox
Saturn’s Magnetosphere: A Dozen Years of Discovery
Twelve years of studying Saturn's magnetosphere has produced many compelling breakthroughs. Even more exciting, however, is what's left to learn.
Posted inNews
Jupiter's Europa Helps Earthlings See Sister Moon's Volcano
By briefly slipping between Earth and sister Jovian moon Io, Europa fortuitously enabled an Earth-based telescope to observe, with greater detail than ever before, a huge, puzzling volcano on Io.