Category Archives: Lunar Science

Weekend Edition
Fri-Mon / 26-29 Apr 2024

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Japan SLIM Moon Lander Defies Expectations by Operating on 4th Lunar Day

JAXA controllers maintaining delicate balance on operational period which began 23 April, timing command / transmission with day-long interval to avoid overheating amid temperatures exceeding 100°C; Reactivation following 3rd lunar night (with temps near -170°C) was earlier in lunar day than previous cycles, resulting in brightest landscape / shortest shadows imaged during mission thus far; Near-equatorial location (13.3160°S, 25.2510°E) of SLIM lander mitigates temperature flux in comparison to near-polar site of Intuitive Machines Odysseus, which functioned 1 lunar day; Both Odysseus and SLIM contain lithium-ion batteries, however SLIM utilizes bespoke pouch cells, whereas Odysseus has COTS cells

 
Credits: JAXA

Tuesday / 23 April 2024

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NASA Reportedly Considering Major Change to Mission Design of US$93B Artemis Program

Artemis 3 could be modified to test Orion-Starship docking and habitability in LEO or perform Gateway rendezvous in lunar orbit rather than a full-fledged human surface landing as originally envisioned, per Ars Technica report citing anonymous sources; ‘NASA continues to work toward… Artemis III test flight to land astronauts near the lunar South Pole in September of 2026’ per official response; Hardware challenges include Orion heat shield modification, spacesuit and lander development; Operational complexity including first in-space cryogenic refueling likely also contributing to reassessment

 
Credits: NASA

Tuesday / 9 April 2024

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NASA Tasked with Development of Lunar Time Standard NLT 31 Dec 2026

As Moon mission cadence continues to grow, and in recognition of gravity-induced spacetime dilation resulting in 58.7-μs offset from Earth, White House Office of Science and Technology Policy is directing NASA (with Commerce, Defense, State, Transportation departments) to define and implement time reference frames for non-Earth celestial bodies, beginning with Coordinated Lunar Time (LTC) in support of Moon surface and cislunar activity; Elements to be considered by National Cislunar Science & Technology sub-Interagency Working Group (NASA + National Space Council) include: Traceability to UTC, Accuracy for PNT, Resilience when out of Earth contact, and Scalability for bodies beyond Earth-Moon system

Pictured: OSTP Director Arati Prabhakar; Credits: NASA, T. Pyle/Caltech/MIT/LIGO Lab

Friday / 29 March 2024

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SLIM Awakens for 3rd Lunar Day of Operations

JAXA team working at Sagamihara Campus SLIM control room are ebullient as their 2.4-m tall lunar lander reactivates yet again, enduring 2 cold nights on the Moon with temperatures below -130°C at mid-latitude landing site (-13.3160°, 25.2510°); Landscape imagery being taken via navigation camera currently amid high temperatures near 100°C with Sun relatively high overhead (necessary to power solar panels in off-nominal orientation); JAXA reports systems are mostly functioning aside from some temperature sensors and battery cells; Lunar day ends for SLIM on 30 March; SLIM team to present at Tanegashima Space Center open house 21 April

Credits: JAXA

Weekend Edition
Fri-Mon / 22-25 March 2024

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Strong Focus on Malapert Mountain at 2024 LPSC Reflects Growing Interest in Strategic Lunar Area

Numerous researchers have converged to analyze the structure, content and relative advantages of landing human and robotic mission on Malapert Massif as highlighted by studies presented at the 55th Lunar and Planetary Science Conference held in The Woodlands, Texas; Geological EVA Science Among Impact Craters and Permanently Shadowed Regions Near a Summit Ridge on Malapert Massif proposes 3 EVA traverses emanating from 85.964°S, 357.681°E landing site to collect samples from 50-35K regolith; High Resolution Geomorphic Map provides detailed crater morphology / PSR locations; Hazard Mapping of the Southern Lunar Surface: Candidate Artemis Landing Site notes maximum average temp of 193.3K / minimum 46.4K

Pictured: Malapert Massif Sun visibility (L) Malapert Massif Earth visibility (R)
Credits: NASA/GSFC/Arizona State University; Bourque, M. et al. (2024) LPSC 55 Abs #2493; Iqbal, W. et al. (2024) LPSC 55 Abs #1009; Kring, D. et al (2024) LPSC 55 Abs #2078

Weekend Edition
Fri-Mon / 1-4 March 2024

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Astronomy from the Moon and Earth Advancing with Near and Far Term Proposals / Missions

Numerous astronomy payloads are manifested on upcoming Moon landings including L-CAM (AstronetX) on ispace Mission 3 NET 2025 and LuSEE-Night (DOE) NET 2026 on Firefly Blue Ghost Mission 2 while more ambitious proposals compiled by Business Insider include the triangular Laser Interferometer Lunar Antenna (Vanderbilt University) for gravitational wave detection; Pantheon Habitat Made from Regolith, With A Focusing Solar Reflector (University of Arizona), a US$10B, 18 optical / IR telescope array with integrated living and farming space; 100,000-antenna FarView (Lunar Resources); Next generation terrestrial observatory to be supported by $1.6B NSF funding: either 25.4-m Giant Magellan Telescope on Cerro Las Campanas, Chile or Thirty Meter Telescope on Maunakea, Hawai’i

Credits: TIO, Firefly

Tuesday / 30 Jan 2024

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SLIM Awakens, Resumes Mission to Characterize Lunar Surface

The motorcycle-sized SLIM lunar lander is collecting solar energy and conducting spectral analysis of regolith near 13.3160° S, 25.2510° E landing site after 10 days of uncertainty following off-nominal descent caused by loss of 1 (of 2) 500 N main engine resulting in a flipped landing orientation requiring westward sun; Despite this adversity, SLIM did achieve 1.4 m/s soft-landing within ~55 m of precision targeted site and is set to continue collecting data until end of lunar day, ~31 Jan UTC (began ~16 Jan) within 10 spectral bands via Multiband Spectroscopic Camera (MBC); Landscape image (L) generated by completing 257 low-res images reveals first light including protuberance dubbed ‘toy poodle’

Credits: JAXA, Ritsumeikan University, University of Aizu

Weekend Edition
Fri-Mon / 26-29 Jan 2024

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Stability of Moon South Pole Under Scrutiny Ahead of Artemis Human Lunar Landings

NASA-supported study Tectonics and Seismicity of the Lunar South Polar Region surveys recent LRO and historical Apollo Passive Seismic Network data to analyze 15 lobate thrust fault scarps, thought to be caused by interior cooling and Earth tidal forces, in the MSP region including in de Gerlache Rim, 1 of 13 candidate sites for Artemis 3; Modelling of associated shallow moonquakes (SMQ) indicate shaking up to 50km from epicenters, a safety concern especially for areas such as Shackleton crater which may be susceptible to regolith landslides; Further insight to be gained when Farside Seismic Suite is carried on Draper Series-2 lander to Schrödinger basin NET 2025 under CLPS

Credits: NASA / LRO

Tuesday / 23 Jan 2024

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Japan Celebrates Becoming 5th Nation to Soft Land on Moon as Efforts to Extend Surface Operations Continue

JAXA has met its minimum success criteria for SLIM mission by landing softly on the lunar surface, however operations were suspended when battery level reached 12% at 02:57, Jan 20 JST (17:57 on 19 Jan UTC) just hours after landing due to attitude anomaly which left solar panels oriented westward; Prior to battery disconnection, JAXA ‘obtained a lot of data‘ and hopes to receive more if lander can be reactivated as Sun moves west toward the end of the current lunar day (~30 Jan); While not designed for lunar night survivability, ‘if the spacecraft survives the -200°F night, then in two weeks’ time, it could revive again‘ per ISAS Director General Hitoshi Kuninaka

Credits: JAXA

Friday / 19 Jan 2024

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Japan Aerospace Exploration Agency Moon Mission Preparing for Final Landing Approach

JAXA Smart Lander for Investigating Moon (SLIM) currently in elliptical 600 x 150 km lunar orbit following Perigee Descent Maneuver #1 (PDM1) which transferred craft from a 600 x 600 km circular orbit on 17 Jan 22:28 JST (13:28 UTC); Operators now preparing for PDM2, which is slated to bring orbit perilune even closer to the lunar surface (15 m) while maintaining 600 km apolune at ~22:40 JST (13:40 UTC) on 19 Jan; Mission success to be measured by 3 criteria: achieving soft landing (minimum), verification of <100 m landing accuracy (full) and continued operations until lunar nightfall (extra); Onboard Multiband Camera to investigate area around 13.2° S, 25.3° E landing site for mineral composition (specifically olivine) and LEV-1 /-2 rovers to explore & image lander; JAXA to livestream landing descent starting 20 Jan 00:00 JST (19 Jan 15:00 UTC)

Credits: JAXA