We are incredibly proud of the science we've accomplished over the last decade.
For eleven years, a small spacecraft named MAVEN traced the slow vanishing of Mars — measuring how a world that may once have harbored life surrendered its atmosphere to the indifferent pull of space. In early December, without warning, MAVEN itself went silent, its batteries drained by an unexpected rotation that severed its last link to Earth. NASA formally closed the mission on Wednesday, acknowledging both the abruptness of the loss and the enduring weight of what was learned. The questions that sent MAVEN to Mars remain alive; the answers it gathered before the end will outlast the machine that found them.
- On December 6, MAVEN passed behind Mars and never spoke again — an unexpected rotation drained its batteries and cut all communication in a matter of hours.
- A spacecraft that had faithfully orbited Mars for over a decade became unreachable overnight, leaving scientists and engineers with silence where data once flowed.
- A review board confirmed the mechanical cause — an uncontrolled spin — but the deeper question of why it happened remains unanswered, with a full root-cause report promised later in 2026.
- Principal investigator Shannon Curry acknowledged the grief felt by her team, even as she insisted that eleven years of atmospheric measurements represent a scientific legacy that cannot be undone.
- MAVEN now continues its orbit around Mars as an inert object — its instruments dark, its purpose spent, its findings preserved in the data it sent home before the end.
On Wednesday, NASA formally ended the MAVEN mission, closing more than eleven years of planetary science that began when the spacecraft launched from Cape Canaveral in November 2013. MAVEN — Mars Atmosphere and Volatile Evolution — was the first NASA mission built specifically to study how Mars lost the thick atmosphere it once possessed, and with it, any chance of sustaining liquid water or life.
The spacecraft arrived at Mars in 2014 and spent the following decade in orbit, measuring the composition of the planet's thin remaining air and tracking the processes that continue to strip gas molecules into space. It was patient, methodical work aimed at one of the most consequential questions in planetary science: how does a world go from potentially habitable to the cold, desiccated desert Mars is today?
The end came without warning. On December 6, NASA received a final signal as MAVEN passed behind Mars — and then nothing. A review board later determined that the spacecraft had begun rotating unexpectedly, causing its batteries to discharge far faster than normal until the communications system lost power entirely. The mission was over before anyone could intervene.
Shannon Curry, the principal investigator from the University of Colorado Boulder, spoke at a Wednesday news conference about the team's grief, but also about what endures. The data MAVEN collected over eleven years will be studied for decades. NASA has not yet explained what triggered the fatal rotation, and a comprehensive final report examining the root cause is expected later in 2026. For now, the spacecraft drifts in a purposeless orbit — silent, but not without meaning.
On Wednesday, NASA formally ended one of its longest-running planetary science missions. The MAVEN spacecraft, which had been circling Mars since 2014, stopped communicating with Earth in early December and will not be brought back online. The loss closes the book on more than eleven years of work aimed at answering a fundamental question about the Red Planet: where did its atmosphere go, and when?
MAVEN—the acronym stands for Mars Atmosphere and Volatile Evolution—launched from Cape Canaveral in Florida in November 2013. It was NASA's first mission built specifically to study the Martian atmosphere and the mechanisms by which gas molecules escape into space. The spacecraft arrived at Mars less than a year later and settled into orbit, where it spent the next decade measuring the composition of the thin air that surrounds the planet today and tracking the processes that strip away what remains.
The mission's end came suddenly. On December 6, NASA received its final signal from MAVEN as the spacecraft passed behind Mars. After that, nothing. A review board determined that the orbiter had begun rotating unexpectedly. That rotation caused the spacecraft's batteries to discharge far more rapidly than normal, eventually draining power from the communications system entirely. Without the ability to transmit or receive signals, MAVEN became silent.
Shannon Curry, the principal investigator who led the scientific team from the University of Colorado Boulder, addressed the loss at a news conference on Wednesday. She acknowledged the disappointment—the team, she said, was deeply affected by what had happened. But she also emphasized what had been accomplished in those eleven years of operation. The data MAVEN collected, the measurements it took, the understanding it provided about how Mars transformed from a potentially habitable world into the cold, thin-aired desert it is today—that work stands.
NASA officials have not publicly speculated about what caused the spacecraft to begin rotating. The agency said it will release a comprehensive final report later in 2026 that will examine the root cause of the failure. For now, MAVEN's mission is over, its instruments silent, its orbit around Mars continuing empty of purpose. The questions it was designed to answer remain important; the answers it gathered before the end will be studied for years to come.
Citas Notables
The team is certainly broken up about this. But at the same time, we are incredibly proud of the science we've accomplished over the last decade.— Shannon Curry, principal investigator, University of Colorado Boulder
La Conversación del Hearth Otra perspectiva de la historia
Why does it matter what happened to Mars's atmosphere? It's just a dead planet now.
Because Mars wasn't always dead. Billions of years ago, it had a thicker atmosphere, liquid water on the surface, conditions that might have supported life. Understanding how it lost all that tells us something about planetary fate—about what can happen to a world over time.
And MAVEN was the tool that figured this out?
MAVEN was measuring the escape mechanisms—how solar wind strips away molecules, how chemical reactions in the upper atmosphere contribute to loss. It was gathering the pieces of the story.
So eleven years of data, and then it just stops responding?
Yes. An unexpected rotation, batteries drained, communications dead. The team had no warning, no chance to prepare for shutdown. It just ended.
Do they know why it rotated?
Not yet. That's what the final report will try to answer. Right now it's a mystery—a mechanical failure that cut the mission short.
What happens to all the data it collected?
That stays. Scientists will be analyzing what MAVEN gathered for years. The mission's end doesn't erase what it learned.