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NASA's LRO finds Lunar pits harbor comfortable 63 F (17 C) temperatures July 29, 2022 3:24 pm BuckGalaxy

Game changer?

NASA-funded scientists have discovered shaded locations within pits on the Moon that always hover around a comfortable 63 F (about 17 C) using data from NASA’s Lunar Reconnaissance Orbiter (LRO) spacecraft and computer modeling.

The pits, and caves to which they may lead, would make thermally stable sites for lunar exploration compared to areas at the Moon’s surface, which heat up to 260 F (about 127 C) during the day and cool to minus 280 F (about minus 173 C) at night.

“About 16 of the more than 200 pits are probably collapsed lava tubes,” said Tyler Horvath, a doctoral student in planetary science at the University of California, Los Angeles, who led the new research, recently published in the journal Geophysical Research Letters.

“Lunar pits are a fascinating feature on the lunar surface,” said LRO Project Scientist Noah Petro of NASA’s Goddard Space Flight Center in Greenbelt, Maryland. “Knowing that they create a stable thermal environment helps us paint a picture of these unique lunar features and the prospect of one day exploring them.”

Lava tubes, also found on Earth, form when molten lava flows beneath a field of cooled lava or a crust forms over a river of lava, leaving a long, hollow tunnel. If the ceiling of a solidified lava tube collapses, it opens a pit that can lead into the rest of the cave-like tube.

Two of the most prominent pits have visible overhangs that clearly lead to caves or voids, and there is strong evidence that another’s overhang may also lead to a large cave.

“Humans evolved living in caves, and to caves we might return when we live on the Moon,” said David Paige, a co-author of the paper who leads the Diviner Lunar Radiometer Experiment aboard LRO that made the temperature measurements used in the study.

Horvath processed data from Diviner – a thermal camera – to find out if the temperature within the pits diverged from those on the surface.

Focusing on a roughly cylindrical 328-foot (100-meter)-deep depression about the length and width of a football field in an area of the Moon known as the Mare Tranquillitatis, Horvath and his colleagues used computer modeling to analyze the thermal properties of the rock and lunar dust and to chart the pit’s temperatures over time.

The results revealed that temperatures within the permanently shadowed reaches of the pit fluctuate only slightly throughout the lunar day, remaining at around 63 F or 17 C. If a cave extends from the bottom of the pit, as images taken by LRO’s Lunar Reconnaissance Orbiter Camera suggest, it too would have this relatively comfortable temperature.

The team, which included UCLA professor of planetary science David Paige and Paul Hayne of the University of Colorado Boulder, believes the shadowing overhang is responsible for the steady temperature, limiting how hot things gets during the day and preventing heat from radiating away at night.

  • I had been hopeful they were much colder by RL 2022-08-02 10:11:49
    • Lava tubes are indeed very promising by RL 2022-08-02 10:01:43
      • That would be a huge advance in LIDAR technology by BuckGalaxy 2022-08-02 10:20:59
        • The drone would be in Mars atmosphere by RL 2022-08-02 10:55:07
          • Wow a did a google search and look what I came up with! by BuckGalaxy 2022-08-02 15:09:56
            • Seems like it would have very limited range by RL 2022-08-02 17:25:06
              • I hadn't considered the rocky surface by BuckGalaxy 2022-08-03 10:01:38
      • I'm still a little fuzzy on how it would feel in the vacuum that surrounds the Moon. n/t. by RobVG 2022-08-01 20:20:31
        • FAM by BuckGalaxy 2022-08-03 08:53:28
          • What ever you do, don't fart. by ER 2022-08-01 20:38:17
          • I'm surprised this post hasn't gotten more traction by BuckGalaxy 2022-07-31 21:23:07
            • It may not be fair, but by ER 2022-08-01 05:48:15
              • There's a healthy interest in off world habitats by RobVG 2022-08-01 20:57:11
              • I plan to buck... by RL 2022-07-31 21:39:10
                • much to discuss. Still considering the concepts. by podrock 2022-07-31 21:29:05

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