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Challenger STS-51L, 41st Observation

Nationwide USA
Organizer: National Aeronautics and Space Administration (NASA)
Educational and ceremonial events held worldwide to advance space technology / education and honor 7 crew members killed in Shuttle...

Explorer 1, 69th Observation

Nationwide USA
Organizer: National Aeronautics and Space Administration (NASA)
American Artemis Return to the Moon For Good is underway, Mars attention and planning advancing, Outer Solar System search for...

Columbia STS-107, 24th Observation

Nationwide USA
Organizer: National Aeronautics and Space Administration (NASA)
Annual international conferences and events take place to further space exploration efforts in remembrance of Columbia 7 loss in 2003:...

Lunar New Year

China (Zhongguo) / Worldwide
Organizer:
Lunar New Year 2027 Spring Festival marks the Year of the Goat.

241st Galactic Tick Day

Global / Inter-Global
Organizer:
Highlighting Galaxy awareness by celebrating the Solar System traveling around Milky Way Galaxy Center every ~225 million Earth years, one...

Pōwehi Day

Statewide Hawai’i, USA
Organizer:
Recognized proclamation to celebrate the first-ever imaged black hole M87* by Event Horizon Telescope collaboration involving Mauna Kea Observatories, given the Hawaiian...

Hubble Space Telescope Marks Another Year in Space

Low Earth Orbit (LEO)
Organizer: National Aeronautics and Space Administration (NASA)
NASA spacecraft with 2.4-meter diameter main telescope begins 38th year in space today, launched Apr 24, 1990; could continue operations...

National Day of Space Flight

China (Zhongguo)
Organizer:
Commemorating the launch of China’s first satellite, Dongfanghong-1 on April 24, 1970.

John F. Kennedy 1st Moon Speech

Nationwide USA
Organizer:
NASA Artemis program to land 1st Woman and Person of Color on Moon is well underway as today is recognized...

Islamic New Year 1449 AH

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

International Moon Day (Annual)

Global / Inter-Global
Organizer: Moon Village Association (MVA)
Celebrating the 1st people walking on the Moon / another celestial body – International Moon Day has been a recognized...

Parker Solar Probe Marks Another Year in Space

Heliocentric Orbit
Organizer: National Aeronautics and Space Administration (NASA)
NASA craft surpasses another full year in space today, having launched Aug 12, 2018; probe  came within ~6.16M km of...

Chandrayaan-2 Marks Another Year in Lunar Orbit

Moon Orbit
Organizer: Indian Space Research Organisation (ISRO)
India orbiter surpasses another full year in lunar polar orbit since reaching the Moon in 2019; Chandrayaan-2 lander and rover...

Chandrayaan-3 Commemorated for Moon Landing (2023)

Statio Shiv Shakti, 69.373°S 32.319°E, Moon Surface
Organizer: Indian Space Research Organisation (ISRO)
Chandrayaan-3 Vikram lander and Pragyan rover celebrated today after successfully landing on Moon in 2023; marking India as the 4th...

Van Allen Probes Mark Another Year in Space

Low Earth Orbit (LEO)
Organizer: National Aeronautics and Space Administration (NASA)
NASA spacecraft surpasses another full year in space today, launched 2012; adding to the understanding of Earth radiation belt environment...

Astrosat Marks Another Year in Space

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

World Space Week

Worldwide
Organizer: World Space Week Association
Celebrating international contributions of space science for betterment of the human condition; Oct 4 is 68th observation of 1st Space...

Mars Odyssey Marks Another Year in Mars Orbit

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

Swift Spacecraft Marks Another Year in Space

Low Earth Orbit (LEO)
Organizer:
Observing gamma-ray bursts & their afterglows in gamma-ray, X-ray, ultraviolet, optical wavelengths from LEO, multiwavelength craft surpasses another year of...

Chang’E-5 Marks Another Year on Moon

Statio Tianchuan, 43° N 51.9° W, Moon Surface
Organizer:
China National Space Administration (CNSA) Chang'E-5 lander at Statio Tianchuan "ship sailing in the Milky Way", Mons Rümker, Oceanus Procellarum,...

Hayabusa 2 Marks Another Year in Space

Asteroid 98943 Torifune Trajectory
Organizer:
Japan Aerospace Exploration Agency (JAXA) Hayabusa surpasses another full year in space today; launched Dec 3, 2014, returned samples to...

XMM-Newton Marks Another Year in Space

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

Chang’E-3 Lander Marks Another Year on Moon

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

WISE / NEOWISE Marks Another Year in Space

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

Lunar New Year

China (Zhongguo) / Worldwide
Organizer:
Lunar New Year 2028 Spring Festival marks the Year of the Monkey.

Apollo 1, 61st Observation

Nationwide USA
Organizer: National Aeronautics and Space Administration (NASA)
Increasing space awareness and education, remembrances and events honor three Apollo 1 crew members lost in 1967 during a launch...

Challenger STS-51L, 42nd Observation

Nationwide USA
Organizer: National Aeronautics and Space Administration (NASA)
Educational and ceremonial events held worldwide to advance space technology / education and honor 7 crew members killed in Shuttle...

Explorer 1, 70th Observation

Nationwide USA
Organizer: National Aeronautics and Space Administration (NASA)
American Artemis Return to the Moon For Good is underway, Mars attention and planning advancing, Outer Solar System search for...

Columbia STS-107, 25th Observation

Nationwide USA
Organizer: National Aeronautics and Space Administration (NASA)
Annual international conferences and events take place to further space exploration efforts in remembrance of Columbia 7 loss in 2003:...

Pōwehi Day

Statewide Hawai’i, USA
Organizer:
Recognized proclamation to celebrate the first-ever imaged black hole M87* by Event Horizon Telescope collaboration involving Mauna Kea Observatories, given the Hawaiian...

Hubble Space Telescope Marks Another Year in Space

Low Earth Orbit (LEO)
Organizer: National Aeronautics and Space Administration (NASA)
NASA spacecraft with 2.4-meter diameter main telescope begins 39th year in space today, launched Apr 24, 1990; could continue operations...

National Day of Space Flight

China (Zhongguo)
Organizer:
Commemorating the launch of China’s first satellite, Dongfanghong-1 on April 24, 1970.

John F. Kennedy 1st Moon Speech

Nationwide USA
Organizer:
NASA Artemis program to land 1st Woman and Person of Color on Moon is well underway as today is recognized...

International Moon Day (Annual)

Global / Inter-Global
Organizer: Moon Village Association (MVA)
Celebrating the 1st people walking on the Moon / another celestial body – International Moon Day has been a recognized...

Parker Solar Probe Marks Another Year in Space

Heliocentric Orbit
Organizer: National Aeronautics and Space Administration (NASA)
NASA craft surpasses another full year in space today, having launched Aug 12, 2018; probe  came within ~6.16M km of...

Chandrayaan-3 Commemorated for Moon Landing (2023)

Statio Shiv Shakti, 69.373°S 32.319°E, Moon Surface
Organizer: Indian Space Research Organisation (ISRO)
Chandrayaan-3 Vikram lander and Pragyan rover celebrated today after successfully landing on Moon in 2023; marking India as the 4th...

Van Allen Probes Mark Another Year in Space

Low Earth Orbit (LEO)
Organizer: National Aeronautics and Space Administration (NASA)
NASA spacecraft surpasses another full year in space today, launched 2012; adding to the understanding of Earth radiation belt environment...