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X-WR-CALDESC:Events for Space Calendar
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DTSTART:20271107T050000
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DTSTART:20281105T050000
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DTSTART:20270328T010000
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BEGIN:VEVENT
DTSTART;VALUE=DATE:20270812
DTEND;VALUE=DATE:20270813
DTSTAMP:20260613T133757
CREATED:20251024T201504Z
LAST-MODIFIED:20260515T030807Z
UID:10000565-1818028800-1818115199@spacecalendar.com
SUMMARY:9th Anniversary of Parker Solar Probe Launch
DESCRIPTION:NASA craft surpasses another full year in space today\, having launched Aug 12\, 2018; probe came within ~6.16M km of the Sun on Dec 24\, 2024 which is ~7 times closer than any prior spacecraft\, traveling faster than any other human-made object at ~692\,000 km/hr.
URL:https://spacecalendar.com/event/parker-solar-probe-begins-next-year-in-space-2/
LOCATION:Heliocentric Orbit
CATEGORIES:Observation / Anniversary
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20270815
DTEND;VALUE=DATE:20270819
DTSTAMP:20260613T133757
CREATED:20251024T201504Z
LAST-MODIFIED:20251222T233255Z
UID:10000297-1818288000-1818633599@spacecalendar.com
SUMMARY:41st Annual Small Satellite Conference
DESCRIPTION:Annual Small Satellite Conference spotlights technologies driving constellation success.
URL:https://spacecalendar.com/event/41st-annual-small-satellite-conference/
LOCATION:Salt Palace Convention Center\, Salt Lake City UT\, USA\, 100 South West Temple\, Salt Lake City\, UT\, 84101\, United States
CATEGORIES:Meeting / Conference / Symposium
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20270820
DTEND;VALUE=DATE:20270821
DTSTAMP:20260613T133757
CREATED:20251024T201504Z
LAST-MODIFIED:20260515T030742Z
UID:10000563-1818720000-1818806399@spacecalendar.com
SUMMARY:8th Anniversary of Chandrayaan-2 Entering Lunar Orbit
DESCRIPTION:India orbiter surpasses another full year in lunar polar orbit since reaching the Moon in 2019; Chandrayaan-2 lander and rover were unsuccessful in lunar landing.
URL:https://spacecalendar.com/event/chandrayaan-2-begins-next-year-in-lunar-orbit-2/
LOCATION:Moon Orbit
CATEGORIES:Observation / Anniversary
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20270823
DTEND;VALUE=DATE:20270824
DTSTAMP:20260613T133757
CREATED:20251024T201504Z
LAST-MODIFIED:20251024T201504Z
UID:10000561-1818979200-1819065599@spacecalendar.com
SUMMARY:Chandrayaan-3 Commemorated for Moon Landing (2023)
DESCRIPTION:Chandrayaan-3 Vikram lander and Pragyan rover celebrated today after successfully landing on Moon in 2023; marking India as the 4th country to land on Moon\, and 1st near the Moon South Pole.
URL:https://spacecalendar.com/event/chandrayaan-3-commemorated-for-moon-landing-2023-3/
LOCATION:Statio Shiv Shakti\, 69.373°S 32.319°E\, Moon Surface
CATEGORIES:Observation / Anniversary
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20270830
DTEND;VALUE=DATE:20270831
DTSTAMP:20260613T133757
CREATED:20251024T201504Z
LAST-MODIFIED:20251024T201504Z
UID:10000559-1819584000-1819670399@spacecalendar.com
SUMMARY:Van Allen Probes Mark Another Year in Space
DESCRIPTION:NASA spacecraft surpasses another full year in space today\, launched 2012; adding to the understanding of Earth radiation belt environment and its variability.
URL:https://spacecalendar.com/event/van-allen-probes-mark-another-year-in-space-2/
LOCATION:Low Earth Orbit (LEO)
CATEGORIES:Observation / Anniversary
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20270901
DTEND;VALUE=DATE:20270902
DTSTAMP:20260613T133757
CREATED:20251024T201504Z
LAST-MODIFIED:20251024T201504Z
UID:10000299-1819756800-1819843199@spacecalendar.com
SUMMARY:NET Sep — Launch Falcon 9 / Near-Earth Object Surveyor
DESCRIPTION:NET Sep — NASA’s Near-Earth Object Surveyor space telescope (NEO Surveyor)\, to help advance planetary defense efforts to discover and characterize most of the potentially hazardous asteroids and comets that come within 30 million miles of Earth’s orbit\, planned to be launched this month.
URL:https://spacecalendar.com/event/net-sep-launch-falcon-9-near-earth-object-surveyor/
LOCATION:TBD
CATEGORIES:Launch
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20270906
DTEND;VALUE=DATE:20270907
DTSTAMP:20260613T133757
CREATED:20251024T201504Z
LAST-MODIFIED:20260515T030713Z
UID:10000557-1820188800-1820275199@spacecalendar.com
SUMMARY:4th Anniversary of X-Ray Imaging and Spectroscopy Mission (XRISM) Launch
DESCRIPTION:Japan’s X-Ray Imaging and Spectroscopy Mission (XRISM)\, studying galactic plasma\, surpasses another full year in space today at ~550-km LEO\, having launched 2023.
URL:https://spacecalendar.com/event/x-ray-imaging-and-spectroscopy-mission-xrism-begins-next-year-in-space-2/
LOCATION:Low Earth Orbit (LEO)
CATEGORIES:Observation / Anniversary
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20270915
DTEND;VALUE=DATE:20270916
DTSTAMP:20260613T133757
CREATED:20251024T201505Z
LAST-MODIFIED:20251024T201505Z
UID:10000567-1820966400-1821052799@spacecalendar.com
SUMMARY:Lucy Mission Flyby of 15094 Polymele
DESCRIPTION:NASA mission to encounter 11 asteroids including a main belt and 7 Jupiter Trojans to come within 415 km of 21-km diameter 15094 Polymele asteroid which may be a collisional fragment and rich in organic tholin compounds.
URL:https://spacecalendar.com/event/lucy-mission-flyby-of-15094-polymele/
LOCATION:Jupiter Greek camp at Lagrangian point L4
CATEGORIES:Space Event / Encounter
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20270919
DTEND;VALUE=DATE:20270925
DTSTAMP:20260613T133757
CREATED:20251024T201505Z
LAST-MODIFIED:20251024T201505Z
UID:10000306-1821312000-1821830399@spacecalendar.com
SUMMARY:American Astronomical Society Division of Planetary Sciences 2027 Meeting
DESCRIPTION:At Rhode Island Convention Center.
URL:https://spacecalendar.com/event/american-astronomical-society-division-of-planetary-sciences-2027-meeting/
LOCATION:Providence RI\, USA
CATEGORIES:Meeting / Conference / Symposium
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20270921
DTEND;VALUE=DATE:20270922
DTSTAMP:20260613T133757
CREATED:20251024T201505Z
LAST-MODIFIED:20260515T030556Z
UID:10000304-1821484800-1821571199@spacecalendar.com
SUMMARY:13th Anniversary of Mars Atmosphere and Volatile EvolutioN (MAVEN) Entering Mars Orbit
DESCRIPTION:NASA Mars Atmosphere and Volatile Evolution (MAVEN) spacecraft surpasses another full year of operations in Mars orbit after insertion on this day 2014; continuing to study upper atmosphere.
URL:https://spacecalendar.com/event/mars-atmosphere-and-volatile-evolution-maven-begins-next-year-in-mars-orbit-2/
LOCATION:Mars Orbit
CATEGORIES:Observation / Anniversary
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20270926
DTEND;VALUE=DATE:20270927
DTSTAMP:20260613T133757
CREATED:20251024T201505Z
LAST-MODIFIED:20251024T201505Z
UID:10000301-1821916800-1822003199@spacecalendar.com
SUMMARY:Double Asteroid Redirection Test (DART) Anniversary Observation
DESCRIPTION:Observed today is 1st planetary defense / asteroid deflection test success: NASA DART crashed into minor-planet moon Dimorphos of asteroid Didymos on this day in 2022\, shortening Dimorphos’ orbital period.
URL:https://spacecalendar.com/event/double-asteroid-redirection-test-dart-anniversary-observation-2/
LOCATION:Worldwide
CATEGORIES:Observation / Anniversary
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20270927
DTEND;VALUE=DATE:20271002
DTSTAMP:20260613T133757
CREATED:20251024T201505Z
LAST-MODIFIED:20251222T234818Z
UID:10000571-1822003200-1822435199@spacecalendar.com
SUMMARY:78th International Astronautical Congress (IAC 2027)
DESCRIPTION:Expects ~10\,000 participants for event themed One Space. Shared Future. Co-events include Space Generation Congress\, September 23-25; UN / IAF Workshop\, September 24-26; IAA Academy Day and International Meeting for Ministers & Members of Parliaments\, both September 26; IAF General Assembly and Bureau Meeting\, both October 1. \nPoland hosts the event for the first time in 60+ years.
URL:https://spacecalendar.com/event/78th-international-astronautical-congress-iac-2027/
LOCATION:Poznań\, Poland
CATEGORIES:Meeting / Conference / Symposium
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20270928
DTEND;VALUE=DATE:20270929
DTSTAMP:20260613T133757
CREATED:20251024T201504Z
LAST-MODIFIED:20260515T030625Z
UID:10000553-1822089600-1822175999@spacecalendar.com
SUMMARY:12th Anniversary of Astrosat Launch
DESCRIPTION:Indian Space Research Organisation (ISRO) first dedicated multi-wavelength space observatory surpasses another full year in space today\, launched 2015.
URL:https://spacecalendar.com/event/astrosat-begins-next-year-in-space-2/
LOCATION:Low Earth Orbit (LEO)
CATEGORIES:Observation / Anniversary
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20271001
DTEND;VALUE=DATE:20271002
DTSTAMP:20260613T133757
CREATED:20251024T201504Z
LAST-MODIFIED:20251024T201504Z
UID:10000294-1822348800-1822435199@spacecalendar.com
SUMMARY:NET Oct — Launch Falcon 9 / Intuitive Machines IM-4 Nova-C Lander
DESCRIPTION:NET Oct  — Under US$116.9M NASA CLPS award\, Intuitive Machines 4th mission to deliver 6 NASA payloads totaling ~79 kg\, including carry ESA Lunar ice drill ProSEED / PROSPECT sensor array\, magnetometer\, radiometer to investigate surface composition\, instrument to measure how lander affects regolith\, retroreflectors as location marker\, a yeast experiment; payload capacity for commercial customers is available.
URL:https://spacecalendar.com/event/net-oct-launch-falcon-9-intuitive-machines-im-4-nova-c-lander/
LOCATION:SLC-39A\, ~29°N\, Kennedy Space Center FL\, USA
CATEGORIES:Launch
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20271001
DTEND;VALUE=DATE:20271002
DTSTAMP:20260613T133757
CREATED:20251024T201504Z
LAST-MODIFIED:20251024T201504Z
UID:10000555-1822348800-1822435199@spacecalendar.com
SUMMARY:National Aeronautics and Space Administration (NASA) First Business Day Observation
DESCRIPTION:Nationwide celebrations and educational events occur to observe NACA (National Advisory Committee for Aeronautics) first business day as newly-formed National Aeronautics and Space Administration (NASA) on this day in 1958.
URL:https://spacecalendar.com/event/national-aeronautics-and-space-administration-nasa-first-business-day-observation-4/
LOCATION:Nationwide USA
CATEGORIES:Observation / Anniversary
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20271001
DTEND;VALUE=DATE:20271002
DTSTAMP:20260613T133757
CREATED:20251024T202116Z
LAST-MODIFIED:20251031T190538Z
UID:10000578-1822348800-1822435199@spacecalendar.com
SUMMARY:NET 2027 — Launch New Glenn / Blue Moon Pathfinder (MK1-SN002) - VIPER
DESCRIPTION:NET Oct 2027 — Second lunar lander from Blue Origin to launch to Moon South Pole region with payloads including NASA Volatiles Investigating Polar Exploration Rover (VIPER). \n 
URL:https://spacecalendar.com/event/net-2027-launch-new-glenn-blue-moon-pathfinder-mk1-sn002-viper/
LOCATION:Cape Canaveral SFS FL\, USA
CATEGORIES:Launch
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20271004
DTEND;VALUE=DATE:20271011
DTSTAMP:20260613T133757
CREATED:20251024T200728Z
LAST-MODIFIED:20251024T200728Z
UID:10000463-1822608000-1823212799@spacecalendar.com
SUMMARY:World Space Week
DESCRIPTION:Celebrating international contributions of space science for betterment of the human condition; Oct 4 is 68th observation of 1st Space mission Sputnik One launched by Soviet Union 1957; Oct 10 is 58th observation of Outer Space Treaty going into effect 1967.
URL:https://spacecalendar.com/event/world-space-week-4/
LOCATION:Worldwide
CATEGORIES:Meeting / Conference / Symposium,Observation / Anniversary
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20271014
DTEND;VALUE=DATE:20271015
DTSTAMP:20260613T133757
CREATED:20251024T200728Z
LAST-MODIFIED:20251024T200728Z
UID:10000461-1823472000-1823558399@spacecalendar.com
SUMMARY:Chinese H-alpha Solar Explorer (CHASE) Begins Next Year in Space
DESCRIPTION:First solar observatory for China known as CHASE or Xihe / 羲和 surpasses another full year in space since launching on this day via Long March 2D in 2021.
URL:https://spacecalendar.com/event/chinese-h-alpha-solar-explorer-chase-begins-next-year-in-space/
LOCATION:Sun-Synchronous Orbit (SSO)
CATEGORIES:Observation / Anniversary
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20271016
DTEND;VALUE=DATE:20271017
DTSTAMP:20260613T133757
CREATED:20251024T200728Z
LAST-MODIFIED:20260515T025622Z
UID:10000465-1823644800-1823731199@spacecalendar.com
SUMMARY:6th Anniversary of Lucy Spacecraft Launch
DESCRIPTION:NASA craft reaches 6 full years in Space\, about mid-way through planned 12-year mission to encounter 11 different asteroids.
URL:https://spacecalendar.com/event/lucy-mission-reaches-6-full-years-in-space/
LOCATION:Jupiter Greek camp at Lagrangian point L4
CATEGORIES:Observation / Anniversary
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20271017
DTEND;VALUE=DATE:20271018
DTSTAMP:20260613T133757
CREATED:20251024T200727Z
LAST-MODIFIED:20251024T200727Z
UID:10000459-1823731200-1823817599@spacecalendar.com
SUMMARY:INTErnational Gamma-Ray Astrophysics Laboratory (INTEGRAL) Begins Next Year in Space
DESCRIPTION:Detecting some of the most energetic radiation in space\, ESA\, NASA\, Roscosmos spacecraft surpasses another year of operations in space\, despite loss of its thrusters; launched 2002\, expected to run out of fuel early 2020s and fall to Earth Feb 2029.
URL:https://spacecalendar.com/event/international-gamma-ray-astrophysics-laboratory-integral-3/
LOCATION:Low Earth Orbit (LEO)
CATEGORIES:Observation / Anniversary
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20271019
DTEND;VALUE=DATE:20271020
DTSTAMP:20260613T133757
CREATED:20251024T200727Z
LAST-MODIFIED:20251024T200727Z
UID:10000455-1823904000-1823990399@spacecalendar.com
SUMMARY:Interstellar Boundary Explorer (IBEX) Begins Next Year in Space
DESCRIPTION:NASA spacecraft mapping boundary between the Solar System and interstellar space surpasses another full year in space; launched on this day 2008.
URL:https://spacecalendar.com/event/interstellar-boundary-explorer-ibex-begins-next-year-in-space-3/
LOCATION:High Earth Orbit (HEO)
CATEGORIES:Observation / Anniversary
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20271019
DTEND;VALUE=DATE:20271020
DTSTAMP:20260613T133757
CREATED:20251024T200727Z
LAST-MODIFIED:20251024T200727Z
UID:10000457-1823904000-1823990399@spacecalendar.com
SUMMARY:ExoMars 2016 Orbiter Begins Next Year in Mars Orbit
DESCRIPTION:European Space Agency (ESA) and Roscosmos spacecraft surpasses another full year at Mars\, launched 2016; craft continues collecting data on atmosphere\, deployed Schiaparelli demonstration lander 19 Oct 2016 (unsuccessful).
URL:https://spacecalendar.com/event/exomars-2016-orbiter-begins-next-year-in-mars-orbit-3/
LOCATION:Mars Orbit
CATEGORIES:Observation / Anniversary
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20271020
DTEND;VALUE=DATE:20271021
DTSTAMP:20260613T133757
CREATED:20251024T200727Z
LAST-MODIFIED:20251024T200727Z
UID:10000453-1823990400-1824076799@spacecalendar.com
SUMMARY:BepiColombo (Mercury Planetary Orbiter and Mercury Magnetospheric Orbiter) Begins Next Year in Space
DESCRIPTION:European Space Agency / JAXA Mercury Planetary Orbiter (MPO) and Mercury Magnetospheric Orbiter (dubbed Mio ‘waterway or fairway’) surpasses another full year in space today\, launched 2018; expected to reach Mercury polar orbit in Nov 2026 to map planet\, investigate magnetosphere.
URL:https://spacecalendar.com/event/bepicolombo-mercury-planetary-orbiter-and-mercury-magnetospheric-orbiter-begins-next-year-in-space-3/
LOCATION:Mercury Trajectory
CATEGORIES:Observation / Anniversary
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20271024
DTEND;VALUE=DATE:20271025
DTSTAMP:20260613T133757
CREATED:20251024T200726Z
LAST-MODIFIED:20251024T200726Z
UID:10000449-1824336000-1824422399@spacecalendar.com
SUMMARY:Mars Odyssey Begins Next Year in Mars Orbit
DESCRIPTION:NASA spacecraft surpasses another full year in orbit around Mars today\, holds record for longest-surviving continually active spacecraft in orbit around a planet other than Earth; launched 2001.
URL:https://spacecalendar.com/event/mars-odyssey-begins-next-year-in-mars-orbit-3/
LOCATION:Mars Orbit
CATEGORIES:Observation / Anniversary
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20271026
DTEND;VALUE=DATE:20271027
DTSTAMP:20260613T133757
CREATED:20251024T200726Z
LAST-MODIFIED:20251024T200726Z
UID:10000447-1824508800-1824595199@spacecalendar.com
SUMMARY:Solar Terrestrial Relations Observatory (STEREO A & B) Mark Another Year in Space
DESCRIPTION:NASA craft imaging Sun and solar phenomena surpasses another full year in space today; launched 2006.
URL:https://spacecalendar.com/event/solar-terrestrial-relations-observatory-stereo-a-b-mark-another-year-in-space-3/
LOCATION:Heliocentric Orbit
CATEGORIES:Observation / Anniversary
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20271102
DTEND;VALUE=DATE:20271103
DTSTAMP:20260613T133757
CREATED:20251024T200726Z
LAST-MODIFIED:20260515T025746Z
UID:10000444-1825113600-1825199999@spacecalendar.com
SUMMARY:International Space Station: 27 Full Years of Continuous Human Occupation
DESCRIPTION:Today marks another full year of continuous Human occupation of ISS; first component Zarya launched Nov 20\, 1998\, occupation began Nov 2\, 2000.
URL:https://spacecalendar.com/event/international-space-station-begins-next-year-of-continuous-human-occupation-2/
LOCATION:Low Earth Orbit (LEO)
CATEGORIES:Observation / Anniversary
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20271113
DTEND;VALUE=DATE:20271114
DTSTAMP:20260613T133757
CREATED:20251024T200726Z
LAST-MODIFIED:20251024T200726Z
UID:10000446-1826064000-1826150399@spacecalendar.com
SUMMARY:Cislunar Autonomous Positioning System Technology Operations and Navigation Experiment (CAPSTONE) Begins Next Year in Space
DESCRIPTION:NASA 12-U CubeSat Capstone acting as a pathfinder for planned International Lunar Gateway surpasses another year around Moon today; launched in 2022.
URL:https://spacecalendar.com/event/cislunar-autonomous-positioning-system-technology-operations-and-navigation-experiment-capstone-begins-next-year-in-space-3/
LOCATION:Near-Rectilinear Halo Orbit / Cislunar Space
CATEGORIES:Observation / Anniversary
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20271120
DTEND;VALUE=DATE:20271121
DTSTAMP:20260613T133757
CREATED:20251024T200726Z
LAST-MODIFIED:20251024T200726Z
UID:10000445-1826668800-1826755199@spacecalendar.com
SUMMARY:Swift Spacecraft Begins Next Year in Space
DESCRIPTION:Observing gamma-ray bursts & their afterglows in gamma-ray\, X-ray\, ultraviolet\, optical wavelengths from LEO\, multiwavelength craft surpasses another year of operations in space today\, launched in 2004.
URL:https://spacecalendar.com/event/swift-spacecraft-begins-next-year-in-space-3/
LOCATION:Low Earth Orbit (LEO)
CATEGORIES:Observation / Anniversary
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20271129
DTEND;VALUE=DATE:20271130
DTSTAMP:20260613T133757
CREATED:20251024T200726Z
LAST-MODIFIED:20260605T020725Z
UID:10000451-1827446400-1827532799@spacecalendar.com
SUMMARY:Tianwen-2 Returns to Earth with Samples from Kamo’oalewa (2016 HO3)
DESCRIPTION:China asteroid sample return capsule planned to return to Earth today with at least 100 grams from Kamo’oalewa (2016 HO3); main Tianwen-2 craft is on trajectory to Main Asteroid Belt to rendezvous with comet 311/P PanSTARRS in 2035.
URL:https://spacecalendar.com/event/tianwen-2-returns-to-earth/
LOCATION:Earth Trajectory
CATEGORIES:Space Event / Encounter
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20271201
DTEND;VALUE=DATE:20271202
DTSTAMP:20260613T133757
CREATED:20251024T200725Z
LAST-MODIFIED:20251024T200725Z
UID:10000442-1827619200-1827705599@spacecalendar.com
SUMMARY:Chang’E-5 Begins Next Year on Moon
DESCRIPTION:China National Space Administration (CNSA) Chang’E-5 lander at Statio Tianchuan “ship sailing in the Milky Way”\, Mons Rümker\, Oceanus Procellarum\, Moon (43° N\, 51.9° W)\, surpasses another full year on lunar surface today; landed on this day in 2020\, with sample return launching from the Moon 2 days later.
URL:https://spacecalendar.com/event/change-5-begins-next-year-on-moon-3/
LOCATION:Statio Tianchuan\, 43° N 51.9° W\, Moon Surface
CATEGORIES:Observation / Anniversary
END:VEVENT
END:VCALENDAR