Giant particle accelerator in the sky

The Earth's magnetic field traps high-energy particles. When the first satellites were launched into space, scientists led by James Van Allen unexpectedly discovered the high-energy particle radiation regions, which were ...

New method determines planetary regolith thermal conductivity

A new analytic model for calculating the effective thermal conductivity of planetary regolith allows scientists to better understand the connections between the physical and thermal properties of planetary surfaces and the ...

European Gateway experiment will monitor radiation in deep space

The first science experiments that will be hosted on the Gateway, the international research outpost orbiting the moon, have been selected by ESA and NASA. Europe's contribution will monitor radiation to gain a complete understanding ...

First of two Van Allen Probes spacecraft ceases operations

On July 19, 2019, at 1:27 p.m. EDT, mission operators sent a shutdown command to one of two Van Allen Probes spacecraft, known as spacecraft B, from the Johns Hopkins University Applied Physics Lab, or APL, in Laurel, Maryland.

New model accurately predicts harmful space weather

A new, first-of-its-kind space weather model reliably predicts space storms of high-energy particles that are harmful to many satellites and spacecraft orbiting in the Earth's outer radiation belt. A paper recently published ...

Van Allen Probes prepare for final descent into Earth's atmosphere

Two tough, resilient NASA spacecraft have been orbiting Earth for the past six and a half years, flying repeatedly through a hazardous zone of charged particles known as the Van Allen radiation belts. The twin Van Allen Probes ...

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