Astronaut spacewalk earth view

Astronaut performs spacewalk with panoramic Earth view, capturing the blue planet against deep space.

About this subject

Spacewalks, or extravehicular activities (EVAs), are critical operations for maintaining stations like the ISS. During these missions, the astronaut relies on a pressurized suit that provides oxygen, regulates temperature, and protects against radiation and micrometeoroids. The view of Earth from about 400 km altitude is breathtaking: continents, oceans, and the thin atmosphere compose a scene that inspires awe and reflection.

The first spacewalk was performed by Soviet cosmonaut Alexei Leonov on March 18, 1965, lasting only 12 minutes. Since then, hundreds of EVAs have been conducted, mainly for repairs and equipment installation. Seeing Earth from space triggers the "overview effect," a cognitive shift emphasizing the planet's unity and fragility, reported by many astronauts.

Remarkably, the ISS completes an orbit every 90 minutes, allowing astronauts to witness 16 sunrises and sunsets per day. Spacewalks are meticulously planned: they can last 6 to 8 hours, with each movement rehearsed on the ground. The spacesuit itself is a mini spacecraft, weighing about 130 kg on Earth but with enhanced mobility in microgravity.

Frequently Asked Questions

What is a spacewalk?

An extravehicular activity where an astronaut exits the spacecraft or space station wearing a pressurized suit to perform tasks in the vacuum of space.

What is the approximate altitude of the International Space Station?

The ISS orbits at about 400 kilometers altitude, slightly varying due to atmospheric drag and maneuvers.

How long does a typical spacewalk last?

Usually between 6 and 8 hours, but it can be extended depending on mission complexity and suit resources.