Humanity tied a spaceflight record late last month, though the news flew under pretty much everyone’s radar.
For a few minutes on Jan. 26, 20 people were in space at the same time. The International Space Station (ISS) hosted 11 of them — seven long-term crewmembers and four visitors on the private Ax-3 mission — and three occupied China’s Tiangong space station.
The other six were aboard Virgin Galactic’s VSS Unity space plane, which reached suborbital space on the company’s Galactic 06 mission. Four of those six were passengers, while two were piloting Unity on Galactic 06, which lasted about an hour from liftoff to touchdown.
At the moment, there are 14 people off Earth — the three Tiangong residents, the seven long-term ISS astronauts and the four Ax-3 flyers, who departed the orbiting lab on Wednesday (Feb. 7) in their SpaceX Crew Dragon capsule and are scheduled to splash down on Friday morning (Feb. 9).
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Virgin Galactic was also involved the first time 20 humans were in space at once, a milestone notched on May 23 of last year. The allocations were similar on that day: six people on Unity (on a flight called Unity 25, the last mission before Virgin Galactic began commercial service), three on Tiangong and 11 on the ISS (seven long-term spaceflyers, along with the four crewmembers of the private Ax-2 mission).
Not everyone will recognize the 20-person record, however, because Virgin Galactic flights get just 55 miles (88 kilometers) or so above Earth at their highest point.
That’s high enough to reach space according to NASA and the U.S. military, which set the boundary at 50 miles (80 km) up. But the international community generally goes with the “Kármán line,” which lies at an altitude of 62 miles (100 km).
Indeed, Guinness World Records puts the most-people-in-space mark at 19, set during the NS-19 suborbital flight of Blue Origin’s New Shepard vehicle on Dec. 11, 2021. New Shepard gets slightly above the Kármán line on its brief missions.
The record for most people in orbit is perhaps more meaningful, given how much energy and effort are required to circle our planet. That mark is 17, set during a brief stretch in May 2023 when Tiangong hosted two three-person crews while 11 people (including the Ax-2 astronauts) lived aboard the ISS.
Hopefully, these numbers will seem laughably small 10 or 15 years from now. Several private space stations are in development at the moment, and both NASA and a China-led coalition aim to get people back to the moon over the next decade or so.
In addition, SpaceX is developing a massive rocket called Starship to help settle both the moon and Mars. So 19 or 20 people off Earth at once will be just the beginning, if at least some of these space dreams come true.
Dr. Thomas Hughes is a UK-based scientist and science communicator who makes complex topics accessible to readers. His articles explore breakthroughs in various scientific disciplines, from space exploration to cutting-edge research.
