Impactor Debris Scattered Within Mars' Mantle (Artist's Concept)
This not-to-scale artist's concept depicts a cutaway view of Mars' interior, revealing the crust, mantle, and core. Debris from ancient impacts lies scattered in the mantle in the form of lumps that are as large as 2.5 miles (4 kilometers) across, data from NASA's InSight Mars lander shows. On the Martian surface at left, a meteoroid impact sends seismic signals (shown as curving concentric lines) through the planet; InSight is depicted at right.
Figure A is an uncropped version of the artist's concept.
InSight placed the first seismometer on Mars' surface in 2018. The extremely sensitive instrument recorded 1,319 marsquakes before the lander ran out of power in 2022, the result of dust caked on its solar panels. Quakes produce seismic waves that change as they pass through different kinds of material, providing scientists with a way to study the interior of a planetary body. To date, the InSight team has measured the size, depth, and composition of Mars' crust, mantle, and core.
The impact debris in the Martian mantle offers a geologic record that could be preserved only on worlds like Mars, whose lack of tectonic plates has kept its interior from being churned up the way Earth's is through a process known as convection.
NASA's Jet Propulsion Laboratory managed InSight for the agency's Science Mission Directorate. InSight was part of NASA's Discovery Program, managed by the agency's Marshall Space Flight Center in Huntsville, Alabama. Lockheed Martin Space in Denver built the InSight spacecraft, including its cruise stage and lander, and supported spacecraft operations for the mission.
A number of European partners, including France's Centre National d'Études Spatiales (CNES) and the German Aerospace Center (DLR), are supporting the InSight mission. CNES provided the Seismic Experiment for Interior Structure (SEIS) instrument to NASA, with the principal investigator at IPGP (Institut de Physique du Globe de Paris). Significant contributions for SEIS came from IPGP; the Max Planck Institute for Solar System Research (MPS) in Germany; the Swiss Federal Institute of Technology (ETH Zurich) in Switzerland; Imperial College London and Oxford University in the United Kingdom; and JPL. DLR provided the Heat Flow and Physical Properties Package (HP3) instrument, with significant contributions from the Space Research Center (CBK) of the Polish Academy of Sciences and Astronika in Poland. Spain's Centro de Astrobiología (CAB) supplied the temperature and wind sensors.
For more about InSight, visit: