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Viking 1 Mars Lander 50th Landing Observation Anniversary

Nationwide USA
Organizer: National Aeronautics and Space Administration (NASA)
First USA spacecraft to successfully land on another planet commemorated today for its accomplishment 50 years ago; originally scheduled for...

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...

40th Annual Small Satellite Conference

Salt Palace Convention Center, Salt Lake City UT, USA 100 South West Temple, Salt Lake City, UT, United States
Organizer: Small Satellite Conference
~5,000 attendees expected; student discount on registration fee; winners of student competition receive up to US$10,000
$1000

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)
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...

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...

ExoMars 2016 Orbiter Marks Another Year in Mars Orbit

Mars Orbit
Organizer: National Aeronautics and Space Administration (NASA)
European Space Agency (ESA) and Roscosmos spacecraft surpasses another full year at Mars, launched 2016; craft continues collecting data on...

Mars Odyssey Marks Another Year in Mars Orbit

Mars Orbit
Organizer: National Aeronautics and Space Administration (NASA)
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: National Aeronautics and Space Administration (NASA)
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)
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)
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)
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)
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: National Aeronautics and Space Administration (NASA)
NASA Wide-field Infrared Survey Explorer spacecraft (redubbed Near-Earth Object WISE – NEOWISE) surpasses another full year in space today; launched...

Gaia Spacecraft Marks Another Year in Space

Sun-Earth L2 Lagrange point
Organizer: European Space Agency (ESA)
ESA spacecraft surpasses another full year in space today; now in extended mission phase working to map more than 1...

James Webb Space Telescope Marks Another Year in Space

Sun-Earth L2 Lagrange point
Organizer: National Aeronautics and Space Administration (NASA)
NASA (STSci) / ESA / CSA-ASC infrared astronomy telescope surpasses next full year in space since launching on this day...

Mars Express Marks Another Year in Mars Orbit

Mars Orbit
Organizer: National Aeronautics and Space Administration (NASA)
ESA spacecraft surpasses next full year in Mars orbit today; will continue to study Mars atmosphere & climate, planet structure,...

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

241st Galactic Tick Day

Global / Inter-Global
Organizer: Milky Way Galaxy
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: Hawai’i, USA
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...