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29 May 2018

The case of the relativistic particles solved

Encircling Earth are two enormous rings — called the Van Allen radiation belts — of highly energized ions and electrons. Various processes can accelerate these particles to relativistic speeds, which endanger spacecraft unlucky enough to enter these giant bands of damaging radiation. Scientists had previously identified certain factors that might cause particles in the belts to become highly energized, but they had not known which cause dominates. Now, with new research from NASA’s Van Allen Probes and Time History of Events and Macroscale Interactions during Substorms — THEMIS — missions, published in Geophysical Research Letters, a journal of the American Geophysical Union, the verdict is in.

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7 April 2012

Pretty Picture: Huygens Crater

Check out what I made today! Actually, I can’t really take much credit. I am starting up a new project using ArcGIS, and I got this pretty picture by just downloading the global topography and daytime infrared datasets from this USGS page. It’s extremely gratifying to download datasets and have them just automatically be aligned and map projected properly. I spent a lot of time today just zooming around Mars and admiring the beautiful data.

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