The MAVEN Mars orbiter has been gathering information on the Mars upper atmosphere, ionosphere, and solar and solar-wind interactions since its orbit insertion in September 2014. MAVEN's science goals are to understand processes driving the escape of atmospheric gases to space at the present epoch, and their variations with solar and local heliospheric conditions together with geographical and seasonal influences. This collection provides a selection of key results obtained up to the time of writing, including measurements of the overall geometry and variability of the Martian magnetosphere, upper atmosphere and ionosphere, and their responses to interplanetary coronal mass ejections and solar-energetic-particle influxes. The ultimate goal is to use these results to determine the integrated loss to space through time and its role in overall Mars atmosphere evolution.
See video highlights from NASA's Nov. 5th news briefing about the MAVEN mission findings here!
AGU Press Release: "MAVEN Mission Reveals Speed of Solar Wind Stripping in Martian Atmosphere"
First Results from the MAVEN Mission to Mars
- Sea level rising faster now than during 1990s, new study shows
- Signals of 660-km topography and harzburgite enrichment in seismic images of whole-mantle upwellings
- Study finds pond expansion a significant factor in loss of Mississippi delta land
- Improved Moving Window Cross-Spectral Analysis for Resolving Large Temporal Seismic Velocity Changes in Permafrost
Eos.org: Earth & Space Science News
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Featured Special Collection
The Magnetospheric Multiscale (MMS) mission has been performing particle and electromagnetic field measurements in the near-Earth environment since its launch in March 2015. Thanks to data with unprecedented time resolution on four identical spacecraft in a close tetrahedron configuration (down to 10 km), MMS science goals are to probe and understand the electron-scale physics involved in the magnetic reconnection process. This collection provides a selection of key results obtained during the first phase of the mission at the dayside magnetopause. It includes new observations of the geometry and variability of the reconnection process, the detailed dynamics of particles, fields and waves in the vicinity of the reconnection region, the observation of small-scale signatures at current sheets formed in the magnetosheath, in Kevlin-Helmholtz vortices, or flux transfer events, as well as other small-scale features which are by-products of magnetic reconnection or not. These results open a new window for our understanding of magnetic reconnection in space, with direct and numerous implications for astrophysical and laboratory plasmas.