ISS Crew Prepares to Return Japan’s HTV-X1 Cargo Spacecraft to Earth After Four Months

Astronauts aboard the International Space Station are preparing to send the Japanese cargo spacecraft HTV‑X1 back to Earth after a four-month mission. The uncrewed vehicle, developed by Japan Aerospace Exploration Agency (JAXA), delivered essential supplies and scientific equipment to the station. As part of the ongoing Expedition 74 mission, the crew continues to conduct important scientific experiments and technology demonstrations that could benefit both space exploration and life on Earth.

ISS Crew Prepares to Send HTV-X1 Cargo Spacecraft Back to Earth

The crew aboard the International Space Station is getting ready to detach and release the Japanese cargo spacecraft HTV‑X1 after it spent nearly four months docked to the orbiting laboratory.

The uncrewed spacecraft, provided by the Japan Aerospace Exploration Agency, arrived at the space station carrying a variety of supplies, equipment, and scientific experiments. During its stay, it served as a vital logistics vehicle supporting astronauts conducting research in microgravity.

Now that its mission of delivering cargo and supporting station operations is complete, the spacecraft is scheduled to depart the station and begin the next phase of its mission.

Robotic Arm to Detach Spacecraft from the Station

According to NASA, flight controllers will use the station’s robotic arm, Canadarm2, to detach the cargo spacecraft from its docking port.

The spacecraft is currently attached to the Harmony module, one of the major connection nodes on the space station. The robotic arm will carefully remove the spacecraft from the module and move it to a temporary holding position before releasing it into orbit.

The detachment process is scheduled to begin at 2:25 p.m. EST on March 5. After the robotic arm positions the spacecraft safely away from the station, mission controllers will command the final release, allowing it to drift into independent orbit.

This complex operation requires precise coordination between astronauts on board the station and ground controllers monitoring the process from Earth.

Spacecraft to Conduct Additional Experiments Before Re-Entry

Even after leaving the International Space Station, the HTV‑X1 will continue contributing to scientific research.

Once released, the spacecraft will remain in orbit at a safe distance from the station for approximately three months. During this time, it will host additional experiments and technology demonstrations.

Eventually, mission controllers will command the spacecraft to deorbit, causing it to re-enter Earth’s atmosphere. During re-entry, the spacecraft will burn up due to extreme heat generated by atmospheric friction.

This process will also safely dispose of several tons of waste and unused materials that were loaded into the cargo vehicle by astronauts during its stay at the station.

Scientific Research Continues Aboard the ISS

While preparations are underway for the cargo spacecraft’s departure, astronauts aboard the International Space Station remain busy conducting scientific experiments.

The crew involved in Expedition 74 has been performing a variety of biology, technology, and medical studies designed to expand our understanding of life in microgravity.

These experiments help scientists explore how living organisms adapt to the space environment and develop technologies that could support long-duration missions to the Moon, Mars, and beyond.

Robotics and Brain Research in the Kibo Laboratory

Inside the station’s Japanese research facility, the Kibo Laboratory Module, astronauts recently installed new robotics equipment and carried out cognitive research experiments.

The research is part of the CIPHER project, which aims to study how spaceflight affects the human brain and cognitive performance. Scientists are particularly interested in understanding how long-duration missions influence memory, decision-making, and mental processing.

By monitoring brain activity and cognitive responses, researchers hope to develop strategies to support astronaut health during future deep-space missions.

AI-Powered Medical Scanning in Microgravity

Another significant experiment conducted on board the station involves a medical scanning device known as EchoFinder-2.

Using artificial intelligence and ultrasound technology, this device allows astronauts to remotely scan internal body structures while receiving guidance through augmented reality.

The experiment took place in the European Columbus Laboratory module and is designed to improve remote medical diagnostics in space.

If successful, the technology could also help expand telemedicine capabilities on Earth, particularly in remote or underserved regions where access to medical specialists may be limited.

Research on Blood Pressure and Circulation in Space

Russian cosmonauts participating in the mission are also conducting medical research to better understand how microgravity affects the human body.

Cosmonaut Fyodor Fedyaev used specialized sensors to monitor blood pressure and cardiovascular activity in space.

Because microgravity significantly alters fluid distribution in the body, astronauts often experience changes in their circulatory system. Studying these effects helps scientists design countermeasures to maintain astronaut health during long-duration missions.

The research could also provide valuable insights into cardiovascular health and blood pressure regulation on Earth.

Supporting the Future of Space Exploration

The ongoing scientific work aboard the International Space Station demonstrates the station’s role as a global laboratory for space research.

Experiments conducted in orbit contribute to advances in medicine, robotics, artificial intelligence, and human physiology.

At the same time, cargo missions such as the HTV‑X1 play a critical role in supporting astronauts by delivering equipment, supplies, and research materials.

As the spacecraft prepares for its return journey, the mission highlights how international collaboration between agencies such as NASA and Japan Aerospace Exploration Agency continues to drive progress in space exploration and scientific discovery.