China Launches Shenzhou 23 — One Astronaut Will Spend a Full Year in Space

China just sent three astronauts to space — and one of them isn't coming home for a full year. That's the headline from the Shenzhou 23 mission, which blasted off Sunday night from the Jiuquan Satellite Launch Center in northwestern China. If you've been even loosely following the global space race, this one is worth paying attention to.

China launched the Shenzhou 23 spacecraft with three astronauts heading to its space station, including one set to stay in space for a year. The crew is made up of commander Zhu Yangzhu, pilot Zhang Zhiyuan, and payload specialist Lai Ka-ying. Lai, who was born and raised in Hong Kong and has a doctoral degree in computer forensics, is the first astronaut from the city on a space mission. That's a big deal for Hong Kong — and a moment that a lot of people there are celebrating.

Now, the really wild part: one of those three astronauts is going to stay behind when the others come home. One crew member aboard the Shenzhou 23 is expected to remain in space for one year, which would be among the world's longest single stays in space. China hasn't said publicly which crew member it will be — the selection will be determined later in the mission based on physical and psychological evaluations. Think of it like the world's most extreme performance review.

Why spend a whole year up there? The astronaut's mission is to "explore human adaptability and performance limits" in long-duration spaceflight environments, state media reported. Basically, China wants to understand what happens to the human body over extended time in space — data that will be critical for future missions to the Moon and eventually Mars. During the year-long mission, China is starting its first human body research programme, which will collect health data from the astronaut to prepare for future missions that will go further in space.

To put the length in perspective: the longest single mission to date by a Chinese astronaut was on the previous Shenzhou-21 crew, who spent 204 days in orbit. The world's longest single space mission is 437 days, held by Russian astronaut Valeri Polyakov. So China isn't breaking the all-time record, but it's making a massive leap forward in its own history.

The station they're headed to is called Tiangong — which literally means "Heavenly Palace." China's astronauts have carried out multiple missions to the Tiangong space station, developed after China was effectively excluded from the International Space Station on U.S. concerns over national security. In other words, China built its own because it wasn't allowed in the club.

The extended stay for one astronaut will pave the way for the Shenzhou 24 mission, due to launch in six months' time. Aboard will be a Pakistani astronaut, who will spend a few days aboard Tiangong before returning to Earth on the outbound Shenzhou 23 vehicle, taking the seat of the astronaut selected to stay for a full year in orbit. It's a logistical puzzle — and China appears to have it well planned out.

The mission also comes with a bit of drama in the rearview mirror. The Shenzhou-23 spacecraft reportedly had enhanced protection for its portview windows — an obvious response to the Shenzhou-20 spacecraft window getting damaged by suspected space debris. The incident triggered a series of emergency responses from the Chinese space agency.

And the bigger picture? The much-anticipated launch comes as China prepares for its first crewed lunar landing by 2030. The U.S. is seen as China's top space rival, with NASA aiming to land astronauts on the lunar surface in 2028. The Moon race is on — and both sides are moving fast.