The First Humans in Space: Yuri Gagarin and the Space Race

On the morning of April 12, 1961, a young man boarded a spacecraft at the Soviet Union’s Baikonur Cosmodrome. His name was Yuri Alekseyevich Gagarin. He became the first human in history to orbit the Earth. Gagarin’s flight was more than a scientific achievement—it stands as one of the most dramatic moments of the Cold War era.

But the journey to space began even earlier. Before humans, animals ventured into space, followed by cosmonauts and astronauts from various nations. This article traces the stories of the pioneers who earned the title of “first.”

1. Animals Went First: Pioneers of Space Exploration

Before sending humans into space, scientists used animals as test subjects to understand the effects of the space environment on living organisms.

Fruit Flies: The First Life Forms in Space (1947)

Surprisingly, the first Earth organisms to reach space were fruit flies. On February 20, 1947, the United States launched fruit flies aboard a captured German V-2 rocket from White Sands, New Mexico. After reaching an altitude of approximately 109 kilometers, the fruit flies safely returned via parachute, contributing to research on how space radiation affects living organisms.^[1]

Monkeys and Chimpanzees: Proxies for Humans

On June 11, 1948, a rhesus monkey named Albert I boarded a V-2 Blossom rocket launched from White Sands, New Mexico. Subsequently, both the United States and the Soviet Union continued to send primates such as monkeys and chimpanzees into space.^[11]

The most famous among them was Ham the chimpanzee. On January 31, 1961, Ham successfully completed a suborbital flight aboard a Mercury-Redstone rocket. Named as an acronym for “Holloman Aero Med,” Ham was trained to pull levers in space and receive banana pellets as rewards. This experiment proved that humans could perform tasks in space, and Ham safely returned to Earth, living until 1983.^[2]

Laika: A Tragic Hero (1957)

The most tragic story among animals in space belongs to Laika. A stray dog from the streets of Moscow, Laika was a Samoyed terrier mix. Soviet scientists believed that an animal with experience surviving on the streets could endure the extreme conditions of space.^[3]

On November 3, 1957, Laika boarded Sputnik 2 and became the first animal to orbit the Earth. However, the technology at the time made atmospheric reentry impossible, and Laika’s survival was never intended. According to documents released in 2002, Laika died from overheating during the fourth orbit, just a few hours after launch.^[3]

While Laika’s sacrifice sparked ethical controversy, it proved that living organisms could survive in space orbit and provided fundamental data for future human spaceflight.

2. Yuri Gagarin: “The Earth Is Blue” (April 12, 1961)

108 Minutes in Vostok 1

On April 12, 1961, Yuri Gagarin, a 27-year-old Soviet Air Force pilot who stood only 157 cm tall—making it easier to fit into the cramped capsule—boarded Vostok 1. Just before launch, he radioed his famous words: “Poyekhali!” (Let’s go!).^[4]

Vostok 1 completed a single orbit. From launch to landing: 108 minutes. The spacecraft circled the Earth at 27,400 kilometers per hour, passing through a minimum altitude of 169 kilometers.^[4]

Interestingly, Gagarin flew with the controls locked. Medical staff and engineers were uncertain how humans would react in zero gravity, so the entire mission was controlled by automatic systems and ground control.^[4]

Looking down at Earth from space, Gagarin said:

“The Earth is blue. How wonderful. It is amazing.”

The landing didn’t go as planned. Gagarin ejected from the capsule at an altitude of 7 kilometers and descended separately by parachute.^[4] This flight made Yuri Gagarin a global hero and put the Soviet Union ahead of the United States in the space race.

Gagarin’s Later Life and Tragic Death

After his spaceflight, Gagarin toured the world and became a symbol of the Soviet Union. But his life was short. On March 27, 1968, he died at age 34 in a MiG-15 fighter jet crash during a training flight. The cause of the accident remains controversial, and Russia honors him as a hero.^[5]

3. The Space Race: A Cold War Technology Competition

The Sputnik Shock (1957)

The space race began on October 4, 1957, when the Soviet Union launched humanity’s first artificial satellite, Sputnik 1. This event shocked the United States, leading to what became known as the “Sputnik Shock.”^[6]

The United States responded immediately. On January 31, 1958, it launched its first satellite, Explorer 1, and established NASA the same year to accelerate space development.^[6]

Project Mercury: America’s Counterattack

Just 23 days after the Soviet Union sent Gagarin into space, on May 5, 1961, Alan Shepard became the first American astronaut as part of Project Mercury. His flight was suborbital—unlike Gagarin, he didn’t complete a full orbit of Earth—but it demonstrated America’s commitment to space development.^[7]

On February 20, 1962, John Glenn became the first American to orbit the Earth aboard Mercury-Atlas 6.^[7]

Kennedy’s Moon Landing Declaration

Spurred by Gagarin’s flight, President John F. Kennedy delivered a historic speech to the U.S. Congress on May 25, 1961:

“I believe that this nation should commit itself to achieving the goal, before this decade is out, of landing a man on the Moon and returning him safely to the Earth.”

To achieve this goal, the United States pursued Project Gemini and Project Apollo.^[6] On July 20, 1969, Apollo 11 landed Neil Armstrong and Buzz Aldrin on the lunar surface, effectively securing America’s victory in the space race.

4. First Astronauts by Nation: The Expansion of the Space Age

After Gagarin, space exploration gradually expanded to more countries. Below is a list of the first astronauts from each nation.

This list demonstrates that space exploration is no longer the exclusive domain of the United States and Soviet Union, but has become a shared human endeavor worldwide.^[8]

5. The History of Women in Space

Women have also played important roles in space exploration history.

Valentina Tereshkova: The First Woman in Space (1963)

Soviet cosmonaut Valentina Tereshkova flew into space aboard Vostok 6 on June 16, 1963, becoming the first woman in space. She orbited Earth 48 times and spent approximately 71 hours in space—more time than all American astronauts combined had spent in space up to that point.^[9]

Sally Ride: The First American Woman in Space (1983)

The first American woman in space was Sally Ride. She flew aboard Space Shuttle Challenger (STS-7) on June 18, 1983. Sally Ride later worked as an astrophysicist and dedicated herself to science education.^[10]

Yi So-yeon: The First Korean Astronaut (2008)

South Korea’s Yi So-yeon arrived at the International Space Station (ISS) aboard Soyuz TMA-12 on April 8, 2008, becoming South Korea’s first astronaut. She spent approximately 11 days in space and conducted 18 scientific experiments.^[8]

Conclusion: The Legacy of Cooperation Born from Competition

One paradox stands out from the early history of space exploration. Gagarin was the first human to go to space, yet the controls of his spacecraft were locked. He was orbiting Earth but could not steer the ship himself. The greatest adventure of the age was carried out under the most controlled conditions imaginable. This symbolizes the true nature of the space race: it was a product of an era in which national prestige came before the curiosity of scientists.^[4]

Yet the outcomes exceeded the intentions. Laika’s death proved that living organisms could survive in space; Ham the chimpanzee pulling a lever demonstrated that humans could perform tasks in orbit; and Tereshkova’s flight showed that space was not the exclusive domain of any one gender. The competition that began amid Cold War rivalry ironically gave way to a multinational stage on which dozens of nations participated.^[6][8] That competition ultimately led to sharing — this is perhaps the most unexpected legacy that space exploration has left behind.