NASA has chosen a proposal led by the Planetary Science Institute to determine whether a potentially large cave stretches underground from the opening of a pit on the Moon. If such a cavern exists, it could eventually offer astronauts natural protection from radiation and the dramatic temperature changes experienced on the lunar surface. The project will receive funding through NASA's Payloads and Research Investigations on the Surface of the Moon (PRISM) program.
PRISM sends scientific instruments to the lunar surface aboard spacecraft supplied by providers participating in the Commercial Lunar Payloads Services (CLPS) initiative. The selected project, known as the Geophysical Instruments for Marius Lunar pit Investigation, or GIMLI, is led by PSI Associate Director and Senior Scientist Than Putzig. PSI is working with Honeybee Robotics, which will construct much of the mission's equipment and instrumentation.
The instruments will travel aboard a lander and rover supplied through the CLPS initiative. PSI's work will also be conducted in partnership with the Norwegian Space Agency. "GIMLI represents the type of ambitious planetary science that PSI was built to pursue," said PSI Director and CEO Amanda Hendrix.
"Than and his team are taking a scientific question we've been studying from orbit and have developed a way to investigate it directly on the Moon. We're excited to have PSI leading this effort and to be partnering with NASA and Honeybee Robotics to learn more about the Moon and its volcanic past." Scientists studying the Moon from orbit have found compelling evidence that caves and lava tubes could be hidden beneath its surface. GIMLI will concentrate on the Marius Hill Pit (MHP), a large opening located within one of the Moon's most volcanically varied regions.
Like other pits identified on the Moon, MHP could provide an entrance into underground structures created by ancient volcanic activity. Rather than relying only on observations from above, GIMLI will give researchers an opportunity to examine MHP directly from the lunar surface. Radar and Seismic Sensors Will Search for a Lava Tube "It's long been a desire of mine to reintroduce intentional active-source seismic methods to planetary science, as it has essentially not been done since the Apollo astronauts conducted the first seismic surveys on the Moon," shared Putzig.
"Combining that method with ground-penetrating radar and gravity measurements makes it all the more exciting, as these methods together will allow us to get a much better understanding of subsurface properties -- including the anticipated detection of a lava tube extending away from the Marius Hills pit." To investigate what lies underground, GIMLI will combine ground penetrating radar, seismic sensors, and a gravimeter. Cameras will also photograph the lunar surface and the exposed walls of the pit. Used together, these instruments will search for a possible underground void extending from MHP and, if one is detected, help scientists estimate its dimensions.
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