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solar activity

An image of the Sun showing an eruption of solar material from the Sun’s left side.
Posted inNews

Chinese-Led Solar Research Is Looking Bright

by Katherine Kornei 24 May 202224 May 2022

With new missions underway and planned, China is stepping up to observe our nearest stellar neighbor.

An illustration of the Solar Orbiter spacecraft near the Sun.
Posted inScience Updates

A New Journey Around (and Around) the Sun

by Daniele Telloni, Francesco Valentini and Raffaele Marino 25 February 202225 February 2022

The Solar Orbiter just completed its commissioning phase while en route to the Sun. It has already provided valuable looks at solar campfires and Venus’s magnetic fields, and it promises much more.

The supergiant Betelgeuse glows red and orange against a dark, starry background. The star’s surface is mottled and emits a faint reddish glow representing its stellar wind. A dark cloud of dust partially obscures the star’s lower left region.
Posted inNews

When Betelgeuse Won’t Explode, You Need a Big Telescope to Prove It

by Kimberly M. S. Cartier 30 June 202126 January 2022

Thanks to last-minute telescope time, researchers pieced together the sequence of events that caused Betelgeuse’s Great Dimming last year.

An enormous stellar flare erupts from Proxima Centauri in this artist’s representation.
Posted inNews

Record-Setting Flare Spotted on the Nearest Star to the Sun

by Katherine Kornei 24 May 202128 April 2022

Proxima Centauri recently let loose a blast of radiation, and ground- and space-based telescopes detected the record-setting event at wavelengths ranging from radio to the ultraviolet.

Plot showing modelled radiation exposures for aircrew and passengers on seventy Paris to New York flight paths if a severe radiation storm had started four hours after take-off of each flight.
Posted inEditors' Highlights

Severe Radiation Storms Pose Health Risk to Air Travel

by Michael A. Hapgood 21 May 20212 February 2022

Simulations of radiation storm fluxes on real flight paths highlight how severe space weather could expose aircrew and passengers on busy transatlantic routes to significant radiation doses.

Graph showing an example of very-low frequency signal phase response to solar X-ray emissions over a 24-hour period
Posted inEditors' Highlights

Using Earth’s Atmosphere as a Solar Flare Monitor

by Michael A. Hapgood 28 January 202027 January 2022

Measurements of very-low frequency radio signal phase and amplitude can detect upper atmosphere changes caused by solar flares, enabling us to monitor flare occurrence and intensity.

Image of the Sun in extreme ultraviolet light taken by NASA’s Solar Dynamics Observatory
Posted inResearch Spotlights

Observational Data Validate Models of Sun’s Influence on Earth

by David Shultz 2 January 202029 September 2021

Using a combination of independent models and observations over multiple timescales, scientists verify two important models that gauge the amount of solar radiation Earth receives.

A purple and red curtain aurora provides a backdrop to the silhouette of a forest.
Posted inNews

Ancient Assyrian Aurorae Help Astronomers Understand Solar Activity

by Mara Johnson-Groh 31 December 201913 April 2022

Records of aurorae in Mesopotamia from 2,600 years ago are helping astronomers understand and predict solar activity today.

Sunspots seen in February 2013
Posted inEditors' Vox

Hearing the Sun Tock

by C. T. Russell, L. K. Jian and J. G. Luhmann 25 October 201926 January 2022

The appearance of sunspots—their number, duration, and location—suggests that the dynamics of the Sun’s outer layer is synchronized with an internal clock.

Black-and-white photo of round mines lined up on a ship’s deck
Posted inNews

Podcast: Space Weather and Global Policy

by S. M. Hanlon 19 August 201925 May 2022

In the latest episode of its Centennial series, AGU’s Third Pod from the Sun talks space weather and its influence on global policy with Delores Knipp.

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