NASA Selects GIMLI Mission to Investigate Giant Lunar Lava Tubes
NASA has selected the Geophysical Instruments for Marius Lunar pit Investigation (GIMLI) mission to determine whether a massive hole on the moon connects to an underground network of lava tubes. Planetary Science Institute scientists will lead the effort to examine the Marius Hill Pit, evaluating whether ancient volcanic activity carved subterranean cavities that could eventually serve as lunar bases and astronaut shelters. NASA chose this specific mission to solve various mysteries about the moon, aiming to uncover whether the hole links to underground cave networks or tunnels shaped by past lunar volcanic activity. Many suspect the surface pit is a collapsed ceiling of an underground lava tube.
Instruments Targeting the Marius Hill Pit
The research team plans to equip a lunar rover with a specialized suite of scientific instruments to probe beneath the surface. Scientists utilize these seismic probes and gravimeters, where the gravimeter refers to a sensor useful for measuring the strength of the local gravitational field. Orbiting spacecraft first spotted the Marius Hill Pit in 2009, when Japan’s Kaguya orbiter captured clear imagery of the feature. Scientists estimate the pit reaches depths of up to 150 feet and spans roughly 300 feet in width, with the subterranean shape taking the form of a lava tube stretching directly from behind the hole on the lunar surface.
NASA has selected the GIMLI project to investigate whether the Marius Hills Pit on the Moon connects to a large underground lava tube or cave. Radar, seismic sensors, gravity measurements and cameras will be used to explore beneath the surface. pic.twitter.com/wHIXCbTQeV
Geological Value and Astronaut Safety
Confirming the existence of intact lava tubes beneath the Marius Hill Pit offers critical insights into the moon’s volcanic history. Gareth Morgan, deputy principal investigator for the GIMLI mission, notes that lava tubes are common features of basaltic volcanism on Earth, allowing researchers to apply terrestrial cave geology to lunar exploration. Beyond charting geological evolution, these subterranean cavities carry strategic value for human spaceflight. If large enough, the underground chambers could protect future astronauts from dangerous solar radiation, extreme surface temperatures, and micrometeoroid impacts.
Frequently Asked Questions About the GIMLI Mission
When was the Marius Hill Pit discovered?
Japan’s Kaguya orbiter first discovered the Marius Hill Pit in 2009 by capturing clear photographic evidence of the depression from lunar orbit.
What dimensions do scientists estimate for the lunar pit?
Researchers estimate that the Marius Hill Pit measures up to 150 feet deep and 300 feet wide.
Which organization conducts the GIMLI mission?
Planetary Science Institute scientists operate the GIMLI mission using specialized radar, seismic, and gravitational instruments mounted on a lunar rover.