NASA ended operations of the Mars Atmosphere and Volatile Evolution orbiter after more than a decade of scientific discovery. The agency shut down MAVEN on January 16, 2026, following a series of technical failures that rendered the spacecraft unable to communicate reliably with Earth.
MAVEN launched in November 2013 and entered Mars orbit in September 2014. The orbiter's primary mission investigated how Mars lost most of its atmosphere over billions of years, transforming from a potentially habitable world with liquid water into the cold, dry planet observed today. The spacecraft carried instruments to measure atmospheric composition, solar wind interactions, and ionospheric processes that stripped away gases into space.
The mission exceeded its baseline two-year timeline by nearly nine years. During that period, MAVEN collected extensive data on Mars's upper atmosphere and the mechanisms driving atmospheric loss. This research directly informed the search for past habitability on Mars and shaped understanding of planetary evolution across the solar system.
Technical degradation began when MAVEN's batteries and solar panels deteriorated beyond repair. The spacecraft's attitude control systems also suffered failures that made pointing instruments difficult. By late 2025, communication windows narrowed significantly, and NASA determined continued operations would yield diminishing scientific returns while consuming resources.
MAVEN's legacy includes refined models of atmospheric escape rates and confirmation that the solar wind removes roughly 100 grams of Martian atmosphere every second. These findings enhanced knowledge about how terrestrial planets lose their protective atmospheric envelopes.
NASA's Mars Science Laboratory rover Curiosity and Perseverance rover continue their surface investigations. The agency also operates the Mars Reconnaissance Orbiter, which continues atmospheric and geological observations from orbit. MAVEN's data archive remains available to researchers worldwide, ensuring its scientific contributions persist through ongoing analysis and future Mars exploration programs.