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The Science Behind Lunar Permanently Shadowed Regions: Ice and Resources for Future Missions
What if the coldest, darkest craters on the Moon are quietly storing a record of solar system history and the resources that could power future exploration?
In this episode, we dive into the science of lunar permanently shadowed regions (PSRs): craters near the Moon’s poles that sunlight hasn’t touched for potentially billions of years. Dr. Jeffrey Zurek is joined by Dr. Katlyn (Caitlin) Ahrens (NASA Goddard Space Flight Center) to unpack what PSRs are, how volatile molecules migrate and freeze there, and why these ultra-cold environments are targets for future missions.
We explore how the Moon’s 1.5-degree axial tilt creates shadowed traps, what the lunar exosphere means for molecule transport, and how researchers balance “easy mode” science with high-risk, high-reward targets. It also illuminates why some of the most exciting discoveries happen in places sunlight never reaches.
Topics Covered
- PSRs & Cold Trapping: Why sunlight hasn't touched these poles for billions of years.
- Lunar Exosphere: Surface processes and molecule migration.
- Mission Logistics: The hurdles of "Pluto-cold" sample return and CLPS landers.
- Geotechnical Risks: Moon-slides, virtual lava tubes, and soil mechanics.
- STEM Outreach: The impact of FIRST Lego League.
Episode Chapters
- (00:00) Intro: The Riddle of Lunar Darkness
- (01:51) The Physics of 1.5° Axial Tilt & PSRs
- (04:04) Meet Dr. Katlyn Ahrens (NASA Goddard)
- (09:33) The Lunar Exosphere vs. Atmosphere
- (15:30) Diverse Volatiles: Water, Methane, & CO2
- (22:38) Logistical Challenges: Cold Sample Return
- (26:18) Double PSRs: Craters within Craters
- (34:14) VIPER Rover & The Future of Lunar Mining
- (41:14) Flour & Dust: Lunar Soil Mechanics
- (46:40) Moonslides & Virtual Lava Tubes
- (49:50) STEM Outreach: FIRST Lego League
- (55:08) The Infamous Science Joke
Links & Resources
- Featured Paper: Diverse lunar polar permanently shadowed regions and environmental metrics for site planning decision making.
- FIRST Lego League
- Support: Pateron
- Socials: Bluesky | Instagram | Facebook
Whimsical Wavelengths: Deep-dive conversations where a working scientist unpacks how we know what we know, one paper, one idea, or whimsical detour at a time. Hosted by Dr. Jeffrey Zurek (P.Geo).
View all episodes
By Jeffrey Mark Zurek - PhD, PGeo, Geophysicist Volcanologist Science CommunicatorWhat if the coldest, darkest craters on the Moon are quietly storing a record of solar system history and the resources that could power future exploration?
In this episode, we dive into the science of lunar permanently shadowed regions (PSRs): craters near the Moon’s poles that sunlight hasn’t touched for potentially billions of years. Dr. Jeffrey Zurek is joined by Dr. Katlyn (Caitlin) Ahrens (NASA Goddard Space Flight Center) to unpack what PSRs are, how volatile molecules migrate and freeze there, and why these ultra-cold environments are targets for future missions.
We explore how the Moon’s 1.5-degree axial tilt creates shadowed traps, what the lunar exosphere means for molecule transport, and how researchers balance “easy mode” science with high-risk, high-reward targets. It also illuminates why some of the most exciting discoveries happen in places sunlight never reaches.
Topics Covered
- PSRs & Cold Trapping: Why sunlight hasn't touched these poles for billions of years.
- Lunar Exosphere: Surface processes and molecule migration.
- Mission Logistics: The hurdles of "Pluto-cold" sample return and CLPS landers.
- Geotechnical Risks: Moon-slides, virtual lava tubes, and soil mechanics.
- STEM Outreach: The impact of FIRST Lego League.
Episode Chapters
- (00:00) Intro: The Riddle of Lunar Darkness
- (01:51) The Physics of 1.5° Axial Tilt & PSRs
- (04:04) Meet Dr. Katlyn Ahrens (NASA Goddard)
- (09:33) The Lunar Exosphere vs. Atmosphere
- (15:30) Diverse Volatiles: Water, Methane, & CO2
- (22:38) Logistical Challenges: Cold Sample Return
- (26:18) Double PSRs: Craters within Craters
- (34:14) VIPER Rover & The Future of Lunar Mining
- (41:14) Flour & Dust: Lunar Soil Mechanics
- (46:40) Moonslides & Virtual Lava Tubes
- (49:50) STEM Outreach: FIRST Lego League
- (55:08) The Infamous Science Joke
Links & Resources
- Featured Paper: Diverse lunar polar permanently shadowed regions and environmental metrics for site planning decision making.
- FIRST Lego League
- Support: Pateron
- Socials: Bluesky | Instagram | Facebook
Whimsical Wavelengths: Deep-dive conversations where a working scientist unpacks how we know what we know, one paper, one idea, or whimsical detour at a time. Hosted by Dr. Jeffrey Zurek (P.Geo).