NASA astronaut Mike Fincke has marked his 400th day in space aboard the International Space Station (ISS). This milestone was achieved by Fincke, a veteran astronaut with four previous missions under his belt.
During his time on the ISS, Fincke and his crewmates have focused on medical and physiological data collection, as well as Earth observations and servicing spacesuit cameras. They also conducted various experiments, including the Bio-Monitor study, which aimed to collect data about heart health and blood flow in microgravity environments.
The Expedition 73 crew has been busy with a range of activities, from maintaining the station’s systems to preparing for future research. The team worked on setting up incubators in the European Space Agency’s Columbus laboratory and servicing high-definition cameras mounted on extravehicular mobility unit (EMU) helmet assemblies.
In other news, astronaut Kimiya Yui successfully captured images of transient luminous events (TLEs), also known as “red sprites,” during his time on the ISS. This achievement is a testament to the team’s dedication to scientific research and exploration.
With 400 days in space, Fincke has joined an exclusive club of astronauts who have surpassed this milestone. The record-breaking astronaut is now among the ninth Americans and 38th person worldwide to have spent more than 400 days off Earth.
The ISS has been continuously crewed for 24 years and nine months, with a team of seven astronauts currently on board. The space station continues to play a vital role in advancing our understanding of space exploration and its impact on humanity.
Source: https://www.space.com/space-exploration/international-space-station/nasa-astronaut-marks-his-400th-day-in-space-on-the-international-space-station-aug-18-22-2025