Category Archives: Lunar Science

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

Friday / 25 Aug 2023

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JAXA Counting Down to Launch of Smart Lander for Investigating Moon (SLIM)

SLIM set to lift off on H-2A rocket with XRISM rideshare from Tanegashima Space Center 26 August 09:34 JST (00:34 UTC) for 4–6-month journey to landing site at 13.2°S, 25.2°E, an area east of Shioli, a 270-m diameter crater emanating distinctive bright rays (itself within 98-km Cyrillus crater, west of Mare Nectaris); 200-kg (dry) SLIM will take fuel-efficient route to lunar orbit taking ~3-4 months, followed by ~1 month in lunar orbit prior to surface descent; Primary mission objective is validation of vision-based navigation system with <100m accuracy; JAXA will stream launch with live coverage starting 09:00 JST (00:00 UTC)

Tuesday / 22 Aug 2023

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ISRO Making Final Checks While Awaiting Lunar Daybreak at Chandrayaan-3 Landing Site

Chandryaan-3 Vikram lunar lander in elliptical 25 x 134 km lunar orbit as ISRO operators at Mission Operations Complex in Bengaluru ensuring craft readiness ahead of powered descent to Moon surface ~20° from MSP set to begin 23 Aug 12:15 UTC, with touchdown on lunar surface now scheduled ~19 minutes later at 12:34 UTC; Landing to be supported by NASA and ESA Deep Space Network antennas in Canberra and Madrid with backup relay via Chandrayaan-2 orbiter; ISRO encourages schools to observe historic moment which will ‘fuel curiosity’ and ‘spark passion for exploration’; Live coverage starts 11:50 UTC

Tuesday / 8 Aug 2023

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Chandrayaan-3 Tightening Orbit Around Moon Ahead of Landing Attempt as Luna-25 and SLIM Launches Approach

ISRO Moon lander Chandrayaan-3 now in an elliptical 170 km x 4313 km lunar orbit as ISTRAC controllers at Mission Operations Complex (MOX) in Bengaluru prepare to execute orbital reduction maneuver 2 of 5, planned for 9 Aug 13:00-14:00 IST (07:30-08:30 UTC) to bring craft into circular, polar 100-km orbit ahead of 23 August landing; Luna-25 rollout set for 8 Aug, with previously reported 10 Aug 2:10:57 MSK (23:10:57 UTC) launch now officially declared by Roscosmos; JAXA SLIM to follow 26 Aug 09:34:57 JST (00:34:57 UTC)

Tuesday / 1 Aug 2023

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Chandrayaan-3 on Course for Lunar Orbit Insertion Following Successful Trans Lunar Injection

ISRO lunar lander Chandrayaan-3 on 5-day cruise to lunar orbit, expected to arrive 5 Aug after set on its way with TLI maneuver firing at 1 Aug perigee (00:15 IST) commanded from ISRO ISTRAC facility in Bengaluru; India is set to become 4th nation to soft-land on Moon, and may become 1st to explore Moon South Pole region; Meanwhile origin of wreckage found near Jurien Bay, Western Australia affirmed by Australian Space Agency to be PSLV stage 3; ASA to store material for ISRO retrieval as obligations under the United Nations space treaties considered

Credits: ISRO

Friday / 21 July 2023

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Russia Set to Resume Moon Exploration with Luna-25

Following a 47-year absence from the Moon, modern Russia is continuing Luna program initiated by USSR with Luna-25 lander currently at Vostochny Cosmodrome awaiting integration into fueled Soyuz Fregat upper stage / payload fairing ahead of NET 11 Aug launch; Luna-25 expected to land near Boguslawsky and Boussingault craters (69.545°S, 43.544°E) or backup site near Mazinus and Simpelius craters (68.773°S, 21.210°E) after 5 day transfer + up to 7 days in lunar orbit, overlapping Chandrayaan-3 expected landing at 69.368°S, 32.348°E NET 23 Aug; Roscosmos Director Yury Borisov estimates 70% chance of success

Credits: Roscosmos, NPO Lavochkin

Tuesday / 18 July 2023

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Chandrayaan-3 Operating Nominally as its Orbit is Raised in Preparation for Trans-Lunar Injection

ISRO is working to conduct next raising maneuver of Chandrayaan-3, which is currently maintaining 41,603 km x 226 km orbit; Apogee firing to occur 17 July between 14:00-15:00 IST will be 3rd of 5 such maneuvers prior to TLI, which is set for 31 July, followed by ~5.5-day transfer and Lunar Orbit Insertion around 5 Aug; Propulsion Module to maintain 100 x 100 km circular orbit while Vikram lander containing Pragyan rover to descend to MSP area surface from 100 x 30km lunar orbit

Credits: ISRO

Tuesday / 11 July 2023

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Lunar Far Side Hot Spot May Indicate Large Presence of Granite, Raising Questions About Moon Volcanism

Thorium-containing Compton–Belkovich Volcanic Complex lies over 50-diameter area with 20x higher heat flux vs typical lunar highlands, thought to signify large granitic structure, per research led by Planetary Science Institute, drawing primarily from Chang’E-1 & 2 four-channel (3-37 GHz) radiometric datasets paired with LRO Diviner IR, Chandrayaan-1, GRAIL, and Apollo readings; If confirmed, find may alter understanding of lunar volcanism / water on Moon timeline; Study lead Matthew Siegler of SMU to present in-person at Goldschmidt Conference in Lyon, France on 12 July

Pictured: Study authors (L-R) Matthew Siegler, Jianquing Fang of PSI; Credits: NASA, GSFC, ASU, WUSTL