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Mark Zastrow

Eos Freelance Writer

An artist’s rendering of the Mars Express spacecraft
Posted inResearch Spotlights

The Accidental Particle Accelerator Orbiting Mars

by Mark Zastrow 3 April 201920 October 2021

The radar aboard the Mars Express spacecraft can generate ion beams arcing through space above the planet, which could lead to a new way of studying the plasma surrounding it.

Researchers look at the impact of solar storms on midlatitude power grids and how power companies can prepare
Posted inResearch Spotlights

Space Weather Threat to Australian Power Networks Assessed

by Mark Zastrow 14 November 201713 October 2021

Power companies should be cautious during severe solar storms to maintain the integrity of Australia’s power grid, a new study finds.

Researchers trace long-term changes in the ionosphere back to Sun cycles, not greenhouse gas emissions.
Posted inResearch Spotlights

Is There a Greenhouse Effect in the Ionosphere, Too? Likely Not

by Mark Zastrow 13 October 2017

Controversial observations of long-term changes in the ionosphere appear to be explained by the Sun’s 11-year cycle of activity, not human greenhouse gas emissions.

Researchers examine how Saturn’s magnetic field overlaps with that of the Sun.
Posted inResearch Spotlights

Probing the Cusps of Saturn’s Magnetic Field

by Mark Zastrow 10 October 201711 January 2022

Data from the Cassini spacecraft show that the cusp regions of Saturn’s magnetic field—where it connects to the Sun’s magnetic field—have similarities to Earth’s and also intriguing differences.

Researchers spot new details in Juno satellite images of Jupiter’s aurora
Posted inResearch Spotlights

Juno Gets Spectacular View of Jupiter’s Aurora

by Mark Zastrow 7 September 201714 October 2017

The NASA spacecraft has taken images of Jupiter’s powerful aurora dancing around its poles, revealing never-before-seen details in their structure.

A new hypothesis explains the radar signature of plasma waves in Earth’s ionosphere
Posted inResearch Spotlights

Mystery of the Ionosphere’s “Gyro Line” Solved

by Mark Zastrow 6 September 201721 October 2021

A new study provides an updated hypothesis to describe a unique radar signature from plasma waves high above Earth, correcting errors that had stood for decades.

Researchers model the movement of strong auroral storms
Posted inResearch Spotlights

Simulations Give New View of Global Auroral Storms

by Mark Zastrow 16 August 201716 November 2021

New computer models capture the movement of the strongest auroral storms as they sweep across Earth at night, challenging scientists’ views of what drives them.

Mystery shrouds the Enceladus plume, and researchers think a dust cloud might be the main culprit
Posted inResearch Spotlights

Where Are the Electrical Currents in the Enceladus Plume?

by Mark Zastrow 7 July 20172 February 2022

A plume of water ice that escapes Saturn’s moon Enceladus should be coursing with electrical currents, but data are mixed. Now simulations suggest that a sticky dust cloud may shield signals.

Researchers unravel how turbulence in storms can generate lightning
Posted inResearch Spotlights

How Storm Turbulence Can Spark Lightning

by Mark Zastrow 6 July 2017

The turbulent pockets of air inside storms can help to build up static electricity in the atmosphere, according to a new study.

Researchers examine images taken by NASA’s Curiosity rover to see how Martian sand dunes form.
Posted inResearch Spotlights

Curiosity Spies Shifting Sands on Mars

by Mark Zastrow 29 June 2017

Images from the rover’s pioneering encounter with sand dunes on Mars constrain wind speeds required to move sand in the thin Martian atmosphere.

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