Alexei Leonov's Historic First Walk in Space

# March 18, 1965: The First Human Spacewalk

On March 18, 1965, Soviet cosmonaut Alexei Leonov floated out of the Voskhod 2 spacecraft and became the first human being to walk in space, achieving one of the most dramatic milestones in the history of human exploration.

The mission was fraught with danger from the very beginning. Leonov, along with commander Pavel Belyayev, launched from the Baikonur Cosmodrome in Kazakhstan aboard Voskhod 2. The spacecraft had been hastily modified to include an inflatable airlock—essentially a fabric tube that could extend from the capsule to allow Leonov to exit into the vacuum of space while Belyayev remained inside.

At 08:34:51 UTC, over the Black Sea, Leonov opened the hatch and pushed himself out into the void. Tethered to the spacecraft by a 5.35-meter cable, he floated in the darkness of space for approximately 12 minutes and 9 seconds. He later described the experience as being "like a seagull with its wings outstretched, soaring." The Earth rotated silently below him, and the sun blazed with an intensity unknown on the planet's surface.

But then things went terribly wrong.

Leonov's spacesuit, exposed to the vacuum of space, began to inflate and balloon outward due to the pressure differential. His suit stiffened so much that he couldn't reach the camera controls on his chest, and more critically, he couldn't fit back through the airlock opening. His hands had slipped out of his gloves, and his feet no longer reached his boots. He was essentially trapped outside, slowly drifting and overheating—his core body temperature rising dangerously.

In a moment of desperation that wasn't revealed to the public for years, Leonov made a life-or-death decision: he would secretly release some of the pressure from his suit through a valve, despite the risk of decompression sickness (the bends). It worked. He deflated enough to squeeze back into the airlock—though he had to go in headfirst rather than feet-first as planned, a maneuver that required him to contort and flip himself around in the cramped space.

The mission's troubles didn't end there. The automatic reentry system failed, forcing Belyayev to manually pilot the spacecraft back to Earth—the first manual reentry in spaceflight history. They overshot their landing zone by 386 kilometers, crash-landing in the deep forests of the Ural Mountains in heavy snow. The cosmonauts spent a freezing night surrounded by wolves before rescue teams could reach them with skis.

Despite the near-catastrophic mishaps, Leonov's spacewalk was a propaganda triumph for the Soviet space program, once again beating the Americans in the Space Race. The United States wouldn't perform its first spacewalk until June 3, 1965, when Ed White floated outside Gemini 4.

Leonov's courage opened the door to all future spacewalks, making possible everything from Hubble Space Telescope repairs to the construction of the International Space Station. The techniques and lessons learned from those terrifying 12 minutes outside Voskhod 2 literally paved the way for humans to work in space.

Leonov went on to become a celebrated figure in spaceflight history, eventually commanding the Soviet side of the Apollo-Soyuz Test Project in 1975. He also became an accomplished artist, painting stunning cosmic scenes inspired by what he witnessed that day. He passed away in 2019, but his legacy as the first human to step into the cosmic ocean remains one of the most daring achievements in the history of science and exploration.

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This content was created in partnership and with the help of Artificial Intelligence AI