Observation / Anniversary

NASA spacecraft with 2.4-meter diameter main telescope begins 37th year in space today, launched Apr 24, 1990; could continue operations...

Commemorating the launch of China’s first satellite, Dongfanghong-1 on April 24, 1970.

May 5, 1961, Alan Shepard reached the air / space dividing line acknowledged by U.S. government, 50 miles / 80...

Tianwen-1 Lander and Zhurong Rover celebrated today for China's first successful landing on Mars; craft landed on this day in...

China Queqiao “bridge of magpies” satellite reaches 8 full years in space today, launched 2018 to provide far side communications...

Chang'E-6 mission is commemorated, having landed on this day in 2024, and returning the first-ever samples from the lunar farside...

Surveyor 1 Lander celebrated today for USA's first successful landing on Moon; craft landed on this day in 1966 at...

Today marks 4th full year / starts 5th year of continuous Human occupation of TSS; Shenzhou 14 three-member crew launched on...

NASA, Cal-tech high-energy astrophysics satellite surpasses another year in space, having launched on this day in 2012.

New Year 1 Muharram (1st day) to begin at sunset on Jun 16; if young New Moon is not visible...

NASA spacecraft reaches 17 full years in Moon orbit today; launched Jun 18, 2009, arrived at Moon 5 days later.

NASA ARTEMIS P1 craft surpasses another year in lunar orbit since 2011; it was 1 of 5 satellites launched 2007...

Jul 5 — Space Age Publishing Company (SPC), Global / Inter-Global: SPC, publisher of Space Calendar and Lunar Enterprise Daily, observes 50 years since inception and...

NASA ARTEMIS P2 craft surpasses another full year in lunar orbit since 2011; 1 of 5 satellites launched 2007 to...

First Human mission to land on Moon in 1969; 1st steps by humans on another World taken by Commander Neil...

First USA spacecraft to successfully land on another planet commemorated today for its accomplishment 50 years ago; originally scheduled for...

NASA spacecraft in extended mission phase reaches 27th full year of operations in space; instruments able to detect X-ray sources...

NASA Curiosity (Mars Science Laboratory) rover surpasses another full year of operations on Mars surface today; launched Nov 26, 2011...

NASA craft surpasses another full year in space today, having launched Aug 12, 2018; probe came within ~6.16M km of...

India orbiter surpasses another full year in lunar polar orbit since reaching the Moon in 2019; Chandrayaan-2 lander and rover...

Chandrayaan-3 Vikram lander and Pragyan rover celebrated today after successfully landing on Moon in 2023; marking India as the 4th...

NASA spacecraft surpasses another full year in space today, launched 2012; adding to the understanding of Earth radiation belt environment...

Japan's X-Ray Imaging and Spectroscopy Mission (XRISM), studying galactic plasma, surpasses another full year in space today at ~550-km LEO, having...

NASA Mars Atmosphere and Volatile Evolution (MAVEN) spacecraft reaches 12 years of operations in Mars orbit after insertion on this...

Observed today is 1st planetary defense / asteroid deflection test success: NASA DART crashed into minor-planet moon Dimorphos of asteroid...

Indian Space Research Organisation (ISRO) first dedicated multi-wavelength space observatory surpasses another full year in space today, launched 2015.

Nationwide celebrations and educational events occur to observe NACA (National Advisory Committee for Aeronautics) first business day as newly-formed National...

First solar observatory for China known as CHASE or Xihe / 羲和 surpasses another full year in space since launching...

Detecting some of the most energetic radiation in space, ESA, NASA, Roscosmos spacecraft surpasses another year of operations in space,...

European Space Agency (ESA) and Roscosmos spacecraft surpasses another full year at Mars, launched 2016; craft continues collecting data on...

NASA spacecraft mapping boundary between the Solar System and interstellar space surpasses another full year in space; launched on this...

European Space Agency / JAXA Mercury Planetary Orbiter (MPO) and Mercury Magnetospheric Orbiter (dubbed Mio ‘waterway or fairway’) surpasses another...

NASA spacecraft surpasses another full year in orbit around Mars today, holds record for longest-surviving continually active spacecraft in orbit...

Change clocks back 1 hour, from Summer Time to Standard Time.

NASA craft imaging Sun and solar phenomena surpasses another full year in space today; launched 2006.

Today marks another full year of continuous Human occupation of ISS; first component Zarya launched Nov 20, 1998, occupation began...

Change clocks back 1 hour from Daylight Saving to Standard Time; does not include Hawai’i, Arizona (except the Navajo Nation),...

NASA 12-U CubeSat Capstone acting as a pathfinder for planned International Lunar Gateway surpasses another year around Moon today; launched...

Observing gamma-ray bursts & their afterglows in gamma-ray, X-ray, ultraviolet, optical wavelengths from LEO, multiwavelength craft surpasses another year of...

China National Space Administration (CNSA) Chang'E-5 lander at Statio Tianchuan "ship sailing in the Milky Way", Mons Rümker, Oceanus Procellarum,...

European Space Agency (ESA) / National Aeronautics and Space Administration (NASA) craft studying sun, surpasses another full year of operations...

Japan Aerospace Exploration Agency (JAXA) Hayabusa surpasses another full year in space today; launched Dec 3, 2014, returned samples to...

European Space Agency (ESA) craft in Very Eccentric Elliptical LEO studying X-ray emissions, star-forming regions, galaxy clusters, environment of supermassive black...

China National Space Administration (CNSA) spacecraft at Guang Han Gong "Moon Palace", Sinus Iridum / Mare Imbrium, 44.12°N 19.51°W, surpasses...

NASA Wide-field Infrared Survey Explorer spacecraft (redubbed Near-Earth Object WISE – NEOWISE) surpasses another full year in space today; launched...

Surpassing 4th full year / entering 5th year in lunar orbit, Korea Aerospace Research Institute (KARI) first lunar spacecraft Danuri...

ESA spacecraft surpasses another full year in space today; now in extended mission phase working to map more than 1...

NASA (STSci) / ESA / CSA-ASC infrared astronomy telescope surpasses next full year in space since launching on this day...

ESA spacecraft surpasses next full year in Mars orbit today; will continue to study Mars atmosphere & climate, planet structure,...

Spacecraft reach 8 full years / enter 9th year on Moon far side, landed 2019 -the first farside landing ever.

Third annual observation of JAXA lunar landing Moon near side equatorial region in 2024 and Japan becoming 5th country to...

Increasing space awareness and education, remembrances and events honor three Apollo 1 crew members lost in 1967 during a launch...

Educational and ceremonial events held worldwide to advance space technology / education and honor 7 crew members killed in Shuttle...

American Artemis Return to the Moon For Good is underway, Mars attention and planning advancing, Outer Solar System search for...

Annual international conferences and events take place to further space exploration efforts in remembrance of Columbia 7 loss in 2003:...

Lunar New Year 2027 Spring Festival marks the Year of the Goat.

China Tianwen-1 orbiter reaches 6 full years of operations in Mars orbit; Lander & Rover touched down ~3 months after...

Mars 2020 Perseverance Rover reaches 5 full years on Mars surface having landed in Jezero Crater on this day in...

Third annual observation of 1st successful commercial lunar landing on Moon by Intuitive Machines and its IM-1 Nova-C Lander "Odysseus"....

Recognized proclamation to celebrate the first-ever imaged black hole M87* by Event Horizon Telescope collaboration involving Mauna Kea Observatories, given the Hawaiian...

Celebrating Yuri Gagarin, the 1st human to orbit Earth on Vostok 1 spacecraft in 1961; the flight lasted 108 minutes...

Space telescope for NASA Explorers program, reaches 9th full year in space today, designed to search for exoplanets using the...

Commemorating the launch of China’s first satellite, Dongfanghong-1 on April 24, 1970.

NASA spacecraft with 2.4-meter diameter main telescope begins 38th year in space today, launched Apr 24, 1990; could continue operations...

China Queqiao “bridge of magpies” satellite reaches 9 full years in space today, launched 2018 to provide far side communications...

Today marks 5th full year / starts 6th year of continuous Human occupation of TSS; Shenzhou 14 three-member crew launched on...

New Year 1 Muharram (1st day) to begin at sunset on Jun 6; if young New Moon is not visible...

NASA, Cal-tech high-energy astrophysics satellite surpasses another year in space, having launched on this day in 2012.

NASA spacecraft reaches 18 full years in Moon orbit today; launched Jun 18, 2009, arrived at Moon 5 days later.

NASA ARTEMIS P1 craft surpasses another year in lunar orbit since 2011; it was 1 of 5 satellites launched 2007...

NASA ARTEMIS P2 craft surpasses another full year in lunar orbit since 2011; 1 of 5 satellites launched 2007 to...

First Human mission to land on Moon in 1969; 1st steps by humans on another World taken by Commander Neil...

First USA spacecraft to successfully land on another planet commemorated today for its accomplishment 51 years ago; originally scheduled for...

NASA spacecraft in extended mission phase reaches 28th full year of operations in space; instruments able to detect X-ray sources...

NASA craft surpasses another full year in space today, having launched Aug 12, 2018; probe came within ~6.16M km of...

India orbiter surpasses another full year in lunar polar orbit since reaching the Moon in 2019; Chandrayaan-2 lander and rover...

Chandrayaan-3 Vikram lander and Pragyan rover celebrated today after successfully landing on Moon in 2023; marking India as the 4th...

NASA spacecraft surpasses another full year in space today, launched 2012; adding to the understanding of Earth radiation belt environment...

Japan's X-Ray Imaging and Spectroscopy Mission (XRISM), studying galactic plasma, surpasses another full year in space today at ~550-km LEO, having...

NASA Mars Atmosphere and Volatile Evolution (MAVEN) spacecraft surpasses another full year of operations in Mars orbit after insertion on...

Observed today is 1st planetary defense / asteroid deflection test success: NASA DART crashed into minor-planet moon Dimorphos of asteroid...

Indian Space Research Organisation (ISRO) first dedicated multi-wavelength space observatory surpasses another full year in space today, launched 2015.

Nationwide celebrations and educational events occur to observe NACA (National Advisory Committee for Aeronautics) first business day as newly-formed National...

First solar observatory for China known as CHASE or Xihe / 羲和 surpasses another full year in space since launching...

NASA craft reaches 6 full years in Space, about mid-way through planned 12-year mission to encounter 11 different asteroids.

Detecting some of the most energetic radiation in space, ESA, NASA, Roscosmos spacecraft surpasses another year of operations in space,...

European Space Agency (ESA) and Roscosmos spacecraft surpasses another full year at Mars, launched 2016; craft continues collecting data on...

NASA spacecraft mapping boundary between the Solar System and interstellar space surpasses another full year in space; launched on this...

European Space Agency / JAXA Mercury Planetary Orbiter (MPO) and Mercury Magnetospheric Orbiter (dubbed Mio ‘waterway or fairway’) surpasses another...

NASA spacecraft surpasses another full year in orbit around Mars today, holds record for longest-surviving continually active spacecraft in orbit...

NASA craft imaging Sun and solar phenomena surpasses another full year in space today; launched 2006.

Today marks another full year of continuous Human occupation of ISS; first component Zarya launched Nov 20, 1998, occupation began...

NASA 12-U CubeSat Capstone acting as a pathfinder for planned International Lunar Gateway surpasses another year around Moon today; launched...

Observing gamma-ray bursts & their afterglows in gamma-ray, X-ray, ultraviolet, optical wavelengths from LEO, multiwavelength craft surpasses another year of...

China National Space Administration (CNSA) Chang'E-5 lander at Statio Tianchuan "ship sailing in the Milky Way", Mons Rümker, Oceanus Procellarum,...

European Space Agency (ESA) / National Aeronautics and Space Administration (NASA) craft studying sun, surpasses another full year of operations...

Japan Aerospace Exploration Agency (JAXA) Hayabusa surpasses another full year in space today; launched Dec 3, 2014, returned samples to...

European Space Agency (ESA) craft in Very Eccentric Elliptical LEO studying X-ray emissions, star-forming regions, galaxy clusters, environment of supermassive black...

NASA Wide-field Infrared Survey Explorer spacecraft (redubbed Near-Earth Object WISE – NEOWISE) surpasses another full year in space today; launched...

China National Space Administration (CNSA) spacecraft at Guang Han Gong "Moon Palace", Sinus Iridum / Mare Imbrium, 44.12°N 19.51°W, surpasses...

Surpassing 5th full year / entering 6th year in lunar orbit, Korea Aerospace Research Institute (KARI) first lunar spacecraft Danuri...

ESA spacecraft surpasses another full year in space today; now in extended mission phase working to map more than 1...

NASA (STSci) / ESA / CSA infrared astronomy telescope surpasses next full year in space since launching on this day...

ESA spacecraft surpasses next full year in Mars orbit today; will continue to study Mars atmosphere & climate, planet structure,...

Lunar New Year 2028 Spring Festival marks the Year of the Monkey.

Increasing space awareness and education, remembrances and events honor three Apollo 1 crew members lost in 1967 during a launch...

Educational and ceremonial events held worldwide to advance space technology / education and honor 7 crew members killed in Shuttle...

American Artemis Return to the Moon For Good is underway, Mars attention and planning advancing, Outer Solar System search for...

Annual international conferences and events take place to further space exploration efforts in remembrance of Columbia 7 loss in 2003:...

China Tianwen-1 orbiter reaches 7 full years of operations in Mars orbit; Lander & Rover touched down ~3 months after...

Fourth annual observation of 1st successful commercial lunar landing on Moon by Intuitive Machines and its IM-1 Nova-C Lander "Odysseus"....

Recognized proclamation to celebrate the first-ever imaged black hole M87* by Event Horizon Telescope collaboration involving Mauna Kea Observatories, given the Hawaiian...

Celebrating Yuri Gagarin, the 1st human to orbit Earth on Vostok 1 spacecraft in 1961; the flight lasted 108 minutes...

NASA spacecraft with 2.4-meter diameter main telescope begins 39th year in space today, launched Apr 24, 1990; could continue operations...

Commemorating the launch of China’s first satellite, Dongfanghong-1 on April 24, 1970.

Today marks 6th full year / starts 7th year of continuous Human occupation of TSS; Shenzhou 14 three-member crew launched on...

NASA spacecraft reaches 19 full years in Moon orbit today; launched Jun 18, 2009, arrived at Moon 5 days later.

NASA ARTEMIS P1 craft surpasses another year in lunar orbit since 2011; it was 1 of 5 satellites launched 2007...

NASA ARTEMIS P2 craft surpasses another full year in lunar orbit since 2011; 1 of 5 satellites launched 2007 to...

First USA spacecraft to successfully land on another planet commemorated today for its accomplishment 52 years ago; originally scheduled for...

First Human mission to land on Moon in 1969; 1st steps by humans on another World taken by Commander Neil...

NASA craft surpasses another full year in space today, having launched Aug 12, 2018; probe came within ~6.16M km of...

Chandrayaan-3 Vikram lander and Pragyan rover celebrated today after successfully landing on Moon in 2023; marking India as the 4th...

NASA spacecraft surpasses another full year in space today, launched 2012; adding to the understanding of Earth radiation belt environment...

Japan's X-Ray Imaging and Spectroscopy Mission (XRISM), studying galactic plasma, surpasses another full year in space today at ~550-km LEO, having...

NASA Mars Atmosphere and Volatile Evolution (MAVEN) spacecraft surpasses another full year of operations in Mars orbit after insertion on...

Observed today is 1st planetary defense / asteroid deflection test success: NASA DART crashed into minor-planet moon Dimorphos of asteroid...

Indian Space Research Organisation (ISRO) first dedicated multi-wavelength space observatory surpasses another full year in space today, launched 2015.

Nationwide celebrations and educational events occur to observe NACA (National Advisory Committee for Aeronautics) first business day as newly-formed National...

Detecting some of the most energetic radiation in space, ESA, NASA, Roscosmos spacecraft surpasses another year of operations in space,...

European Space Agency (ESA) and Roscosmos spacecraft surpasses another full year at Mars, launched 2016; craft continues collecting data on...

NASA spacecraft mapping boundary between the Solar System and interstellar space surpasses another full year in space; launched on this...

European Space Agency / JAXA Mercury Planetary Orbiter (MPO) and Mercury Magnetospheric Orbiter (dubbed Mio ‘waterway or fairway’) surpasses another...

NASA spacecraft surpasses another full year in orbit around Mars today, holds record for longest-surviving continually active spacecraft in orbit...

NASA craft imaging Sun and solar phenomena surpasses another full year in space today; launched 2006.

Today marks another full year of continuous Human occupation of ISS; first component Zarya launched Nov 20, 1998, occupation began...

NASA 12-U CubeSat Capstone acting as a pathfinder for planned International Lunar Gateway surpasses another year around Moon today; launched...

Observing gamma-ray bursts & their afterglows in gamma-ray, X-ray, ultraviolet, optical wavelengths from LEO, multiwavelength craft surpasses another year of...

China National Space Administration (CNSA) Chang'E-5 lander at Statio Tianchuan "ship sailing in the Milky Way", Mons Rümker, Oceanus Procellarum,...

European Space Agency (ESA) / National Aeronautics and Space Administration (NASA) craft studying sun, surpasses another full year of operations...

Japan Aerospace Exploration Agency (JAXA) Hayabusa surpasses another full year in space today; launched Dec 3, 2014, returned samples to...

European Space Agency (ESA) craft in Very Eccentric Elliptical LEO studying X-ray emissions, star-forming regions, galaxy clusters, environment of supermassive black...