NASA 우주비행사, 지구 위 250마일 상공에서 6시간 반 활동

Imagine stepping outside your office building — except there is no ground below you, and you are floating 250 miles above Earth. This is what astronaut work looks like on the International Space Station.

Recently, two NASA astronauts, Anil Menon and Jessica Meir, did exactly that. They suited up in spacesuits and ventured outside the ISS for a challenging mission. The mission lasted six and a half hours — a long, demanding day for anyone, let alone someone working in space.

Why spend so much time outside the station? The answer is about energy. The ISS needs electrical power to run all its equipment, computers, and life support systems. Right now, the station uses solar arrays — large panels that collect sunlight and turn it into electricity. But these panels are getting older, and they do not produce as much power as before. Scientists and engineers decided the best solution was to add new, more powerful solar arrays to the station.

Before they could attach these new panels, the astronauts had to prepare the workspace. Think of it like building a house — you need a strong foundation and the right hardware in place before you can add walls. Menon and Meir installed special mounting hardware, metal frames that would hold the new solar arrays in the right position. This hardware had to be placed with precision. Even a small mistake could affect how well the panels work. Every bolt, every connection, every measurement matters when you are working in the vacuum of space.

The work was not easy. Astronauts in spacesuits move slowly and carefully because the suits are bulky and thick. They are designed to protect the astronaut from extreme cold, radiation, and the total absence of air. Inside the suit, the astronaut experiences pressure changes and must manage oxygen carefully. Despite these challenges, Menon and Meir worked steadily, completing their assigned tasks.

Why is this work important? Better solar panels mean more electricity for the station. More electricity means the ISS can run more experiments, support more research, and keep the astronauts safer. Scientists on Earth depend on the ISS for experiments that could help develop new medicines, improve materials, or teach us more about living in space. Every spacewalk like this one is a small step toward making that possible.

The next time you turn on a light switch or charge your phone, think about the astronauts who float in the darkness above Earth, working to keep a laboratory alive in space. Their work reminds us that sometimes the most important jobs happen where we cannot see them — and that human teamwork and determination can accomplish remarkable things, even in the most extreme environments. What kind of challenge would you be willing to face if you knew it would help people?

Inspired by reporting from BBC News.