Oops! NASA Once Lost a $125 Million Spacecraft Because Engineers Forgot to Convert to Metric

tech.yahoo.com • March 31, 2026 • science

Key Points:

The Mars Climate Orbiter (MCO), launched in December 1998 to study Martian weather and support the Mars Polar Lander, failed to reach Mars due to a critical navigation error.
NASA's investigation revealed that Lockheed Martin, the contractor responsible for the orbiter's software, neglected to convert measurements from Imperial to metric units, causing the spacecraft to approach Mars too closely.
As a result, the MCO either burned up in the Martian atmosphere or was lost in space, with communication lost when it was approximately 35 miles above Mars' surface.
NASA was also criticized for inadequate oversight, including failure to verify the software's unit system and rushing the mission without thorough testing, ultimately leading to the mission's failure.
The Mars Polar Lander mission was also negatively impacted by this unit conversion error, contributing to its own catastrophic failure shortly after.

Trending Business