In the ancient Chinese myth, magpies form a bridge across the heavens so separated lovers may meet — and now China reaches toward the moon with a satellite bearing that same name, Queqiao-2, to bridge the silence between Earth and the lunar far side. Scheduled for launch in March 2024, this 1,200-kilogram relay satellite will make possible what no nation has yet achieved: the retrieval of samples from the moon's perpetually hidden hemisphere. It is both a feat of orbital mechanics and a declaration of long-term intent, as China positions itself not merely as an explorer of the moon but as a bu
China to Launch Queqiao-2 Relay Satellite in March 2024 for Lunar Missions
A spacecraft on the far side cannot communicate directly with Earth.
Mark
Why does the moon's far side need a relay satellite at all? Can't a lander just send signals directly to Earth?
Mimi
The moon is tidally locked—one side always faces us, the other never does. A spacecraft on the far side is blocked by the entire moon. It's like trying to shout across a mountain. You need someone standing on the other side of the mountain to relay your message.
Mark
So Queqiao-2 sits in an orbit where it can see both Earth and the far side lander simultaneously?
Mimi
Exactly. It swings out into an elliptical orbit that takes it beyond the moon, giving it line of sight to both. It's a geometric solution to a geometric problem.
Mark
The satellite will support missions through 2028. That's a long time. How does it stay in orbit without running out of fuel?
Mimi
The orbit itself is stable—what they call a frozen orbit. It doesn't naturally decay the way most orbits do. So Queqiao-2 needs very little fuel for maintenance over its eight-year lifetime. It's efficient by design.
Mark
China mentioned this satellite might help other countries' lunar missions. Is that genuine, or diplomatic language?
Mimi
Probably both. China is building infrastructure that happens to be useful. If another nation lands on the lunar south pole, they'd benefit from having a relay already in place. It's practical cooperation, but it also positions China as a space power with capabilities others depend on.
Mark
What comes after this? Is Queqiao-2 the end of the relay story?
Mimi
No. This is the foundation for a full constellation—multiple Queqiao satellites working together to support a permanent research station on the moon. And eventually, they're thinking about relays at Venus and Mars. This is just the beginning.
El Pulso
- The moon's far side is unreachable by radio — no signal can cross that silence without a relay in orbit, and Chang'e-6's historic sample mission cannot proceed without one.
- Queqiao-2 must be precisely placed in an elliptical frozen orbit, a gravitationally stable path that lets it see both Earth's ground stations and a lander operating in a crater billions of years old.
- The satellite is engineered to outlast a single mission — multi-band communications, reprogrammable software, and an eight-year lifespan mean it will serve Chang'e-7 and Chang'e-8 through 2028 while still supporting the already-operating Chang'e-4 rover.
- China is quietly offering Queqiao-2's relay capacity to other nations attempting south pole or far-side landings, reframing a national asset as shared lunar infrastructure.
- What launches in March 2024 is not just a satellite but the first node of an envisioned constellation China hopes to extend, eventually, all the way to Venus and Mars.
In the ancient Chinese myth, magpies form a bridge across the heavens so separated lovers may meet — and now China reaches toward the moon with a satellite bearing that same name, Queqiao-2, to bridge the silence between Earth and the lunar far side. Scheduled for launch in March 2024, this 1,200-kilogram relay satellite will make possible what no nation has yet achieved: the retrieval of samples from the moon's perpetually hidden hemisphere. It is both a feat of orbital mechanics and a declaration of long-term intent, as China positions itself not merely as an explorer of the moon but as a builder of the infrastructure that future exploration — by many nations — may depend upon.
China is preparing to launch Queqiao-2 — named for the mythological Magpie Bridge of Chinese folklore — aboard a Long March 8 rocket from Wenchang in March 2024. The 1,200-kilogram satellite carries a 4.2-meter parabolic antenna and will serve as the essential communications link for a series of lunar missions that would otherwise be impossible to conduct.
Its first and most urgent task is supporting Chang'e-6, which will attempt to collect rock and soil samples from the moon's far side — a feat no nation has accomplished. The challenge is geographic and absolute: the moon is tidally locked, its far hemisphere forever turned away from Earth, making direct radio contact impossible. Queqiao-2 will occupy a 24-hour elliptical orbit that swings far beyond the moon, maintaining line of sight with both Earth's ground stations and the lander as it works within Apollo crater, deep inside the ancient South Pole-Aitken basin.
After Chang'e-6 completes its two-day surface operations, the satellite will shift to a 12-hour orbit to support Chang'e-7 in 2026 and Chang'e-8 in 2028, both targeting the lunar south pole. It will simultaneously continue assisting Chang'e-4, the lander and rover that has operated on the far side since 2019. The elliptical frozen orbit is inherently stable, requiring little fuel — a meaningful advantage for a spacecraft designed to serve missions across nearly a decade.
Queqiao-2 is a significant upgrade over its 2018 predecessor, which still operates in a halo orbit around the Earth-moon Lagrange point L2. The new satellite carries multiple communication bands, reconfigurable software, and three scientific instruments, including an extreme ultraviolet camera and equipment for measuring the Earth-moon distance with high precision. Two experimental CubeSats — Tiandu-1 and Tiandu-2 — will ride along to test navigation and communications payloads in the lunar environment.
China has suggested Queqiao-2 could also serve other nations' lunar missions at the south pole or far side, positioning itself as a provider of shared infrastructure. The satellite is conceived as the first node of a future constellation bearing the same name — one that Chinese planners envision extending, eventually, to Venus and Mars.
China is preparing to send a new communications satellite into lunar orbit this spring, a move that will anchor the country's most ambitious moon exploration campaign yet. Queqiao-2, named after a figure from Chinese folklore—the Magpie Bridge—is scheduled to launch in March 2024 aboard a Long March 8 rocket from the Wenchang spaceport on China's southern coast. The satellite weighs 1,200 kilograms and carries a 4.2-meter parabolic antenna designed to relay signals across the vast distance between Earth and the lunar surface, a capability that will prove essential for the missions China has lined up over the next five years.
The satellite's first job will be supporting Chang'e-6, a spacecraft that will attempt something no nation has done before: collect rock and soil samples from the far side of the moon. That mission launches in the second quarter of 2024 and will land in Apollo crater, a mid-latitude region within the South Pole-Aitken basin. The challenge is fundamental to lunar geography. The moon is tidally locked to Earth, meaning one hemisphere always faces us while the other remains perpetually hidden. A spacecraft on the far side cannot communicate directly with Earth. It needs a relay—a middleman in orbit that can see both the distant lander and home. Queqiao-2 will occupy a 24-hour elliptical orbit that swings far beyond the moon, positioning it to maintain line of sight with both Earth's ground stations and Chang'e-6 as it works. The lunar surface operations are expected to wrap up in roughly two days.
This is not Queqiao-2's only assignment. After Chang'e-6 completes its work, the satellite will shift into a 12-hour orbital pattern to support two additional missions: Chang'e-7 in 2026 and Chang'e-8 in 2028, both targeting the lunar south pole. The satellite will also continue assisting Chang'e-4, a lander and rover that has been operating on the far side since 2019 and remains functional. The orbital mechanics work in China's favor. The elliptical frozen orbit is inherently stable, requiring minimal fuel to maintain over the satellite's projected eight-year-plus operational lifetime—a significant advantage for a spacecraft that will need to serve multiple missions across nearly a decade.
Queqiao-2 represents an evolution from its predecessor, the original Queqiao satellite launched in 2018. That earlier relay remains operational in a halo orbit around the Earth-moon Lagrange point L2, roughly 70,000 kilometers beyond the moon. The new satellite is more capable, equipped with multiple communication bands—X and UHF for talking to spacecraft, S and Ka-bands for Earth contact—and software that can be reconfigured in orbit to adapt to changing mission needs. It will also carry three scientific instruments: an extreme ultraviolet camera, a neutral atom imager, and equipment for a very long baseline interferometry experiment that will measure the Earth-moon distance with precision.
The launch manifest includes two experimental CubeSats, Tiandu-1 and Tiandu-2, developed by China's newly established Deep Space Exploration Laboratory. These small satellites will test communications and navigation payloads in the lunar environment, gathering data that could inform future relay systems. The Deep Space Exploration Laboratory, operating under the China National Space Administration, is becoming increasingly central to China's lunar ambitions and its broader diplomatic efforts in space exploration.
China has also signaled that Queqiao-2 could serve purposes beyond its own missions. Officials have suggested the satellite might provide relay communications for other nations' lunar landing attempts at the south pole or far side—a gesture that positions China as a provider of lunar infrastructure. More ambitiously, Queqiao-2 is being framed as the foundation for an expanded constellation of the same name. That future network would support China's International Lunar Research Station, a project still in development. Looking even further ahead, Chinese planners envision extending the Queqiao constellation to Venus and Mars, creating a web of relay satellites that would enable deep space exploration across the inner solar system. For now, though, the focus is on March 2024 and the work of getting to the moon's far side.
Citas Notables
Apart from providing relay support for future Chinese lunar missions, it is possible to provide relay communication services for other lunar landing exploration missions at the lunar south pole or lunar far side in the future.— Zhang Lihua, DFH Satellite, China Aerospace Science and Technology Corp.
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