THIS DAY IN SPACE

Phobos 2 Mission Ends
On September 10, 1989, the Soviet Phobos 2 mission to Mars officially ended after communication with the spacecraft was lost. Launched in July 1988, Phobos 2 aimed to study the Martian atmosphere and surface, as well as conduct a close flyby of Mars’s moon Phobos to deploy two landers. After a successful Mars orbit insertion and months of valuable data collection, the mission’s control system failed just before the landers were to be released. Despite its abrupt end, Phobos 2 transmitted high-resolution images of Mars and Phobos, magnetic field measurements, and infrared mapping that provided insights into Martian geology and temperature variations. It also revealed data supporting the existence of subsurface ice on Mars. The mission's ambitious plan to land on Phobos, though unrealized, inspired renewed interest in Mars's moons as exploration targets. Phobos 2 highlighted the high-risk nature of interplanetary missions and the complexity of operating in deep space. The mission is remembered both for its groundbreaking data and as a symbol of unfulfilled potential, fueling interest in future Mars and Phobos exploration, including concepts by ESA and JAXA.

Launch of Discoverer XIV (Corona)
On September 10, 1960, the United States launched Discoverer XIV, a cover name for one of the first successful satellites under the Corona reconnaissance program. Although the mission’s primary goal was military surveillance rather than space science, it marked a major technological leap in satellite imaging. Discoverer XIV carried high-resolution cameras designed to photograph the Soviet Union during the Cold War. The film was ejected from the satellite in a capsule that re-entered Earth's atmosphere and was recovered mid-air by an aircraft—a dramatic and sophisticated maneuver. This satellite became the first successful recovery of such a capsule and laid the foundation for decades of space-based reconnaissance. While not a scientific mission, Corona advanced many aspects of orbital technology, from launch precision and onboard systems to remote sensing and data retrieval. The mission also served as an early demonstration of satellite utility for Earth observation, foreshadowing today’s use of satellites for environmental monitoring, agriculture, and disaster response. Discoverer XIV was declassified in the 1990s, revealing just how significant these early programs were in shaping the space race and national security policies.