Space Records

Russian cosmonaut Valeri Polyakov, M.D. (1942-) holds the record for the longest spaceflight duration. During 1994-1995, he spent 437.8 contiguous days in orbit, almost all of them aboard the Mir space station.

The largest number of people in space at the same time was thirteen, and this has happened four times.

The fastest humans have ever traveled (relative to Earth) occurred on May 26, 1969 when the Apollo 10 crew (Thomas Stafford, John Young, and Eugene Cernan) reached a speed of 24,791 mph—just 0.0037% the speed of light.

Both Jerry Ross and Franklin Chang Díaz hold the record for the most spaceflights. Both astronauts have gone into space seven times. Jerry Ross (STS-61-B, STS-27, STS-37, STS-55, STS-74, STS-88, STS-110) between November 26, 1985 and April 19, 2002 (Space Shuttle Atlantis: 5, Columbia: 1, Endeavour: 1), and Franklin Chang Díaz (STS-61-C, STS-34, STS-46, STS-60, STS-75, STS-91, STS-111) between January 12, 1986 and June 19, 2002 (Space Shuttle Columbia: 2, Atlantis: 2, Discovery: 2, Endeavour: 1). Both astronauts were mission specialists in the NASA Astronaut Group 9, announced May 29, 1980.

The farthest humans have ever been from Earth occurred at 0:21 UT on April 15, 1970 when the crippled Apollo 13 spacecraft (Jim Lovell, Fred Haise, and Jack Swigert) executed a free-return trajectory to Earth. They were furthest from Earth above the lunar farside, 158 miles above the surface and 248,655 miles from Earth.

The youngest person ever to fly in space was Gherman Titov who was 25 years old during his solo Vostok 2 spaceflight on August 6, 1961. He was the second person to orbit the Earth.

The oldest person ever to fly in space was John Glenn who was 77 years old during his second spaceflight aboard the Space Shuttle Discovery STS-95 from October 29, 1998 to November 7, 1998. He was the first American to orbit the Earth in 1962.

The longest spacewalk occurred on March 11, 2001 when James Voss and Susan Helms were outside the Space Shuttle Discovery (STS-102) and the International Space Station for 8 hours and 56 minutes.

The longest moonwalk occurred on December 12-13, 1972 when Apollo 17 astronauts Eugene Cernan and Harrison Schmitt spent 7 hours and 37 minutes outside the lunar module on their second of three lunar excursions. All were longer than 7 hours. This was the final Apollo mission, and Gene Cernan, who died in 2017, is still the last person to walk on the surface of the Moon.