This month we look around our solar system—and much farther—as we celebrate AGU’s Centennial.
solar system
Posted inResearch Spotlights
Sampling the Space Between the Stars
Data from the Cassini and Voyager spacecraft reveal new information about the Sun’s magnetic bubble.
Posted inEditors' Highlights
Solar Properties Rival for Control of Mars’s Bow Shock
While most planetary bow shocks are controlled by the solar wind, at Mars the solar EUV flux is equally important.
Posted inNews
Planetary Low Tide May Force Regular Sunspot Sync Ups
A regular alignment of the planets—no, it’s not pseudoscience—makes a strong enough tug to regulate the Sun’s 11- and 22-year cycles.
Posted inResearch Spotlights
No Underground Magma Ocean on Jupiter’s Fiery Moon?
A new study suggests alternative explanations for Io’s unusual magnetic field.
Posted inNews
New Tiny Moon of Neptune Discovered
The moon’s size and orbit point to it being the remnant of a collision with Neptune’s moon Proteus.
Posted inNews
New Horizons Spacecraft to Reach Farthest Body in Solar System Yet
The flyby of Ultima Thule on New Year’s Day will give us our first glimpse of a mysterious Kuiper Belt object.
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 inEditors' Highlights
Anatomy of a Flux Rope Hurtling Through the Solar System
Pancaking and erosion can explain a lot of the structural change in magnetic flux ropes as they fly evolve during their supersonic flight through the inner solar system.
Posted inEditors' Highlights
Fast CMEs Continue to Decelerate in the Outer Heliosphere
Most fast coronal mass ejections will be decelerated into ambient solar wind quickly in the inner heliosphere, but some of them continue the deceleration with an even larger amplitude beyond 1 AU.