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International Observe the Moon Night 2026

Worldwide
Organizer: International Observe the Moon Night Organization
For observation, appreciation, understanding of the Moon / its connection to planetary science / exploration; 1st quarter Moon is best...

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...

NET 2027 — Launch Luna-26

Vostochny Cosmodrome, Russia
Organizer: Roscosmos State Corporation
NET 2027 — Roscosmos State Corporation, Launch Luna-26, Vostochny Cosmodrome, Russia: Roscosmos hopes to launch the Luna-Resurs O (Luna-Resurs Orbiter) to...

NET 2027 — Launch Vehicle Mark-3 (LVM3) / Chandrayaan-4

Satish Dhawan Space Center, Sriharikota, India
Organizer: Indian Space Research Organisation (ISRO)
NET 2027 — ISRO to launch its Launch Vehicle Mark-3 (LVM3) with Chandrayaan-4 lunar lander from Satish Dhawan Space Center,...

NET 2027 — Launch Long March 5 / Xuntian Telescope

Wenchang Space Launch Center, Hainan Island, China (19° N)
Organizer: China National Space Administration (CNSA)
NET 2027 — CNSA to launch Long March 5 with Xuntian space telescope from Wenchang Space Launch Center, Hainan Island,...

2027 AIAA SciTech Forum

Hyatt Regency Orlando Orlando, FL, United States
Organizer: American Institute of Aeronautics and Astronautics (AIAA)
AIAA SciTech Forum—the premier aerospace R&D event of the year exploring the science, technologies, and capabilities that are transforming aerospace.

Apollo 1, 60th 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, 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...

Yuri’s Night Celebrations

Worldwide
Organizer: Yuri’s Night
Launching parties around the world every year on or around April 12th, in commemoration of Yuri Gagarin becoming the first...

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...

Tianwen-2 Departs Kamo’oalewa (2016 HO3)

Earth Trajectory
Organizer: China National Space Administration (CNSA)
China Tianwen-2 asteroid sample return mission planned to depart Kamo’oalewa (2016 HO3) today and return to Earth with least 100...

National Day of Space Flight

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

International Space Day

Worldwide
Organizer:
First Friday in May, events and presentations to promote STEM education and inspire people to continue the work of Space...

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...

IAUGA2027: IAU General Assembly

Rome, Italy
Organizer: International Astronomical Union (IAU)
International Astronomical Union will post a dedicated website "soon". The General Assembly is held every 3 years for astronomers worldwide...

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...