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Mark Zastrow

Eos Freelance Writer

Artist’s illustration of the SES-14 communications satellite above Earth
Posted inResearch Spotlights

A GOLDen Way to Study Space Weather

by Mark Zastrow 4 August 202029 September 2021

A NASA mission is observing airglow in the upper atmosphere and uncovering what it tells us about Earth’s space weather system.

Artist’s illustration of the Lagrange mission under consideration by the European Space Agency showing two spacecraft situated between the Sun and Earth
Posted inResearch Spotlights

How to Improve Space Weather Forecasting

by Mark Zastrow 19 June 202022 February 2023

The field of space weather forecasting could take cues from its Earthly counterpart to increase the reliability of models as well as warning times ahead of inbound solar storms.

Side-by-side illustrations of a Martian horizon featuring a dry landscape and a wet landscape
Posted inResearch Spotlights

How Mars’s Magnetic Field Let Its Atmosphere Slip Away

by Mark Zastrow 31 March 202010 February 2023

A planet’s magnetic field usually protects its atmosphere from being blown away by its star. But new research suggests Mars’s weak magnetic field may have helped its atmosphere escape.

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.

Artist’s illustration of the Magnetospheric Multiscale mission spacecraft traveling through Earth’s magnetic field
Posted inResearch Spotlights

Deciphering Electron Signatures in Earth’s Magnetic Tail

by Mark Zastrow 21 February 202018 July 2023

A new analysis of spacecraft data collected near the tip of Earth’s magnetotail sheds light on how geomagnetic activity affects the motion of electrons in this region.

NASA’s Mars Atmosphere and Volatile Evolution spacecraft orbits Mars and samples electrons behind the Martian bow shock in this artist’s rendition.
Posted inResearch Spotlights

Explaining the Missing Energy in Mars’s Electrons

by Mark Zastrow 11 November 201910 March 2022

Electrons energized and trapped at Mars were thought to lose energy inside the planet’s magnetosheath, but new research suggests a different explanation of spacecraft data.

Schematic showing the basic shape and properties of the heliosphere, the protective magnetic bubble created by the solar wind
Posted inResearch Spotlights

Sampling the Space Between the Stars

by Mark Zastrow 19 August 201916 November 2021

Data from the Cassini and Voyager spacecraft reveal new information about the Sun’s magnetic bubble.

Annotated graphic of a solar wind discontinuity
Posted inResearch Spotlights

Understanding the Turbulent Nature of the Solar Wind

by Mark Zastrow 13 June 20194 May 2022

Sometimes the conditions in the solar wind can change dramatically over short distances. Satellite observations of these features show that they’re more complex than previously thought.

Aurora over Lofoten, Norway
Posted inResearch Spotlights

Data Mining Reveals the Dynamics of Auroral Substorms

by Mark Zastrow 31 May 201916 November 2021

An analysis of 5 decades of satellite data has pieced together the most comprehensive picture yet of substorms, the magnetic disturbances that cause surges of aurora.

Auroras seen from the International Space Station
Posted inResearch Spotlights

Bringing Clarity to What Drives Auroras

by Mark Zastrow 24 April 201911 August 2022

A new classification scheme helps researchers distinguish what accelerates the electrons that create auroras.

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Decoding Crop Evapotranspiration

6 May 20256 May 2025
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