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astrophysics

Photo looking down on Earth from a satellite, showing red and green streaks flickering in the atmosphere
Posted inNews

Eavesdropping on the Vibrations of Earth’s Magnetic Bubble

by Erin Martin-Jones 9 May 202316 May 2023

A NASA-funded crowdsourced science project has converted the unheard sounds resonating inside Earth’s magnetic shield into audible tracks, revealing an orchestra of whistles, wooshes, and chirps.

Image of a Coronal Mass Ejection traveling towards Earth.
Posted inEditors' Vox

Machine Learning Helps to Solve Problems in Heliophysics

by Enrico Camporeale, Veronique Delouille, Thomas Berger and Sophie Murray 3 November 20222 November 2022

A new special collection invites papers pertaining to the use of machine learning techniques in all sub-fields of heliophysics.

An illustration of the Solar Orbiter positioned in front of the Sun.
Posted inAGU News

Brighter Skies Ahead

Heather Goss, AGU Publisher by Heather Goss 25 August 202217 January 2023

As solar max approaches, new tech is on call.

Ions moving in the Earth’s dipole magnetic field are represented by colored dots in equatorial phase coordinates.
Posted inEditors' Highlights

Modification of Energetic Particles Loss Cone During Storms

by Viviane Pierrard 17 August 202214 October 2022

The loss cone of energetic particles in the Earth’s inner magnetosphere is substantially modified during disturbed times, with important implications for the radiation-belt and ring current modeling.

Two plots showing the Cumulative probability of scintillation exceeding a certain value versus geomagnetic activity in July-December 2017.
Posted inEditors' Highlights

The Auroral E-region is a Source for Ionospheric Scintillation

by Michael P. Hickey 9 August 202111 August 2022

Observations reveal a connection between auroral particle precipitation and scintillation, indicating that the ionospheric E-region is a key source region for phase scintillation at auroral latitudes.

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 A. 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.

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Coupled Isotopes Reveal Sedimentary Sources of Rare Metal Granites

17 June 202516 June 2025
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Inside Volcanic Clouds: Where Tephra Goes and Why It Matters

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