5 Years in Space: James Webb Space Telescope
NASA (STSci) / ESA / CSA-ASC infrared astronomy telescope surpasses next full year in space since launching on this day via Ariane 5 ECA rocket in 2021.
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Observation / Anniversary
Events for December 25, 2026
All Day
23 Years in Mars Orbit: ESA’s Mars Express
ESA spacecraft surpasses next full year in Mars orbit today; will continue to study Mars atmosphere & climate, planet structure, mineralogy, geology, and to search for traces of water; launched June 2, 2003 and arrived at Mars in Dec 2003.