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astrophysics

Illustration of the Wind spacecraft in front of the magnetosphere that surrounds Earth.
Posted inEditors' Vox

Wind: Discoveries and Impacts of a Venerable Spacecraft

by L.B. Wilson III 18 May 202110 March 2023

Wind has been one of the most robust, diverse, long-lasting, and impactful heliophysics missions ever to have been carried out.

Artist’s depiction of Earth in a shower of cosmic rays coming from a background Sun.
Posted inNews

Taking Stock of Cosmic Rays in the Solar System

by Jure Japelj 5 May 202125 October 2021

Scientists seek to understand the elusive properties of stellar and galactic cosmic rays before searching for life on exoplanets.

Artist’s conception of the motion of charged particles in Earth’s magnetosphere
Posted inResearch Spotlights

A New Approach to Characterizing Space Plasmas

by Morgan Rehnberg 16 December 202013 October 2022

When plasma particle velocity distributions have multiple, distinct parts, treating each as a separate beam may yield more intuitive results.

Plots recording observations of electromagnetic ion cyclotron waves at four different locations
Posted inEditors' Highlights

All Hands on Deck to Catch Ion Cyclotron Waves

by Andrew Yau 7 August 202011 August 2022

An international armada of orbiting satellites and ground VLF network join forces to form a “magnetosphere-ionosphere observatory” to size up electromagnetic ion cyclotron waves in the magnetosphere.

Satellite image of the Sun in X-rays and ultraviolet light
Posted inNews

Ghostly Particles from the Sun Confirm Nuclear Fusion

Katherine Kornei, Science Writer by Katherine Kornei 14 July 202012 October 2022

Using the Borexino particle detector—located deep underground in Italy—researchers spot elusive neutrinos from the Sun’s CNO cycle.

Illustration of how “electron wings” form around a spacecraft traveling through a plasma
Posted inResearch Spotlights

“Electron Wings” Can Interfere with Spacecraft Measurements

by Mark Zastrow 26 February 202030 September 2021

Spacecraft sometimes produce a form of electrical self-interference as they zip through plasmas in space—a previously unreported effect that may be lurking in old data sets.

Profile of a radio telescope at sunset
Posted inNews

More Than Just Astronomy: Radio Telescopes for Geophysics

Katherine Kornei, Science Writer by Katherine Kornei 6 December 201912 December 2025

Linking an existing network of radio telescopes with satellite radar would make it possible to measure ground displacements in a globally consistent way, scientists propose.

Observed ion energy and time-of-flight spectra in Jupiter's northern and southern hemisphere
Posted inEditors' Highlights

First Inside Look at Hot and Cold Ions in Jupiter’s Ionosphere

by Andrew Yau 23 September 201911 August 2022

The first in-situ ion observations from NASA’s Juno spacecraft reveal the surprising, simultaneous presence of cold protons and hot oxygen and sulfur ions in the high-latitude ionosphere of Jupiter.

Black-and-orange illustration of a black hole and accretion disk
Posted inNews

New Proof That Accretion Disks Align with Their Black Holes

Rachel Crowell, Science Writer by Rachel Crowell 10 July 201924 May 2022

In the most detailed and highest-resolution black hole simulation to date, an international team of researchers showed the Bardeen-Petterson effect for the first time.

Posted inEditors' Highlights

Red and Green Aurora Stop and Go for Different Reasons

by Viviane Pierrard 5 July 201911 August 2022

Green-line arc is found to be embedded within large-scale upward field aligned currents while red-line-only arc is found to be associated with low-energy precipitation bursts.

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Features from AGU Publications

Research Spotlights

How Internal Waves Transport Energy Thousands of Miles Across the Ocean

26 March 202626 March 2026
Editors' Highlights

Machine Learning Could Enhance Earth System Modeling

10 April 20267 April 2026
Editors' Vox

Synergistic Integration of Flood Inundation Modeling Methods

10 April 202610 April 2026
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