Chinese Lunar Exploration Program

• 1. Introduction

  ›

  On the 3rd of January 2019, a Chinese spacecraft touched down on the far side of the Moon. No human-made vehicle had ever done that before. The far side never faces Earth, which means any probe landing there is completely cut off from direct radio contact with home. Yet China pulled it off. That mission, Chang'e 4, was just one chapter in a program that began in 2004 and has since rewritten the record books for lunar exploration. How did China build a lunar program from scratch, claim firsts that no other nation had managed in decades, and set its sights on putting astronauts on the Moon by the end of this decade? The answers lie in the deliberate, phase-by-phase architecture of the Chinese Lunar Exploration Program, and in a series of robotic missions named after a goddess who, according to myth, flew to the Moon long before any rocket ever could.

• 2. The Goddess and the Plan

  ›

  Chang'e, the Chinese Moon goddess, lends her name to every mission in the program. The official Chinese name is Zhongguó Tànyuè Gongchéng, but the name most people know is the Chang'e Project. Behind the mythology is a very practical engineering logic. Ouyang Ziyuan, a geologist and chemical cosmologist, serves as the program's chief scientist. Ye Peijian is both chief commander and chief designer. Sun Jiadong, an aerospace engineer, holds the title of general designer, with Sun Zezhou as deputy. Luan Enjie leads the program as its chief manager. Together they shaped the program into four distinct phases, each mission acting as a technology demonstrator for the one that follows. Phase I focused on orbiters, Phase II on soft landers and rovers, Phase III on sample return, and Phase IV on building an autonomous lunar research station near the south pole. That sequencing was not accidental. China's standard satellite telemetry in the early program years had a range of only 80,000 km, while the Moon can sit more than 400,000 km away at apogee. Every phase pushed the technology a step further than the last.

• 3. First Orbits

  ›

  Chang'e 1 lifted off from Xichang Satellite Launch Center on the 24th of October 2007 aboard a Long March 3A rocket, roughly six months behind its original target window of April that year. Once in lunar orbit it scanned the entire Moon in unprecedented detail, producing a high-definition three-dimensional map intended to guide future landing attempts. The probe also mapped the abundance and distribution of chemical elements across the surface, assessing potentially useful resources. Chang'e 2 followed on the 1st of October 2010 aboard a Long March 3C and reached the Moon in under five days, compared with twelve days for its predecessor. After completing its mapping work in even finer detail, Chang'e 2 did something no lunar orbiter had done before: it left the Moon entirely, flew to the Earth-Sun Lagrangian point to test the long-range tracking network, and then on the 13th of December 2012 completed a flyby of asteroid 4179 Toutatis before heading into deep space. Along the way it carried a laser altimeter provided by the German Aerospace Center, which mapped lunar topography with high precision, and used the European Space Agency's deep space network for communication during the Toutatis extended mission.

• 4. Landing on the Moon

  ›

  Chang'e 3, launched on the 2nd of December 2013 aboard a Long March 3B, landed on the Moon twelve days later in Mare Imbrium. It deployed Yutu, a 140 kg rover designed to explore an area of three square kilometres during a three-month mission. Yutu also carried equipment to conduct ultraviolet observations of galaxies, active galactic nuclei, variable stars, quasars, and blazars, as well as the structure of Earth's plasmasphere. Landing safely required a computer vision system that processed data from a downward-facing camera and two ranging devices. The software held the spacecraft in a hover at 100 metres, then at 30 metres, while it scanned for a suitable spot. The Yutu rover added its own front-facing stereo cameras for hazard avoidance once on the ground. Chang'e 4, originally a backup for Chang'e 3 and scheduled for 2015, was repurposed after its predecessor succeeded. A relay satellite called Queqiao-1, placed at the Earth-Moon L2 point in 2018, made far-side communications possible. Chang'e 4 landed on the 3rd of January 2019 in the Von Karman crater within the South Pole-Aitken Basin. Its Yutu-2 rover went on to become the longest-lived lunar rover on record. The mission carried scientific payloads from the Netherlands, Germany, Sweden, and Saudi Arabia, and received tracking support from NASA's Lunar Reconnaissance Orbiter team.

• 5. Bringing Samples Home

  ›

  Chang'e 5-T1, launched on the 23rd of October 2014, had one job: prove that a capsule returning from the Moon could survive re-entry and that spacecraft could dock in lunar orbit without human hands. Those tests cleared the way for Chang'e 5, the most complex mission the program had attempted. Chang'e 5 launched on the 23rd of November 2020 and landed near Mons Rumker on the 1st of December 2020. It returned to Earth with 1,731 grams of lunar material, marking the first robotic lunar sample return since the Soviet Luna 24 mission in 1976. The docking that took place in lunar orbit was itself a first for any robotic mission. Chang'e 5 also carried a French magnetic field detector, and its ground operations drew tracking support from agencies in Europe, Argentina, Namibia, Pakistan, and elsewhere. Scientists from Australia, Russia, France, the United States, the United Kingdom, and Sweden have since participated in research using those samples. Chang'e 6 extended the achievement further. Launched on the 3rd of May 2024 aboard a Long March 5, it investigated the topography, composition, and subsurface structure of the South Pole-Aitken Basin on the far side of the Moon. Its samples, returned from Apollo Basin, were the first ever retrieved from the lunar far side. The mission also carried a small Chinese rover named Jinchan, which performed infrared spectroscopy on the surface.

• 6. Engineering the Impossible

  ›

  Each mission demanded solutions to problems that had no off-the-shelf answer. The temperature swings faced by the probes stretched from 130 degrees Celsius on the sun-facing side to negative 170 degrees on the shaded side, requiring custom thermal control in every detector. The high-radiation environment between Earth and Moon forced engineers to build hardened electronics resistant to electromagnetic damage. Orbit design for lunar missions is fundamentally more complicated than for Earth-orbiting satellites, because the probes operate within a three-body gravitational system involving Earth, Moon, and Sun. Chang'e 1 and Chang'e 2 were first placed in highly elliptical Earth orbits, then transferred to a lunar trajectory through three separate acceleration burns at 16, 24, and 48 hours into flight. Once in lunar orbit, each probe executed three braking maneuvers across three distinct orbit phases before beginning its main mission. Attitude control added another layer of complexity: onboard detectors had to face the Moon, antennas had to face Earth, and solar panels had to face the Sun, all simultaneously, as all three bodies move relative to the spacecraft. The ground tracking network, which combines 50-metre antennas in Beijing with 40-metre antennas in Kunming, Shanghai, and Urumqi to form a 3,000-km baseline VLBI array, met these demands but, by the program's own assessment, only by a small margin.

• 7. The South Pole and Beyond

  ›

  Chang'e 7, expected to launch in August 2026 on a Long March 5, will carry an orbiter, a lander, and a novel mini-flying probe to survey the lunar south pole for resources, particularly water ice. Chang'e 8, planned for 2028, will test in-situ resource utilization technologies and a three-dimensional printing experiment that would use material gathered on the Moon to construct a structure. It will also carry a small sealed ecosystem experiment. Both missions feed directly into China's stated goal: constructing the International Lunar Research Station at the south pole beginning in 2031, in collaboration with Russia and eleven other countries. China announced the International Lunar Research Station Cooperation Organization in April, with founding members including South Africa, Belarus, Azerbaijan, Venezuela, Pakistan, and Egypt. On the 12th of July 2023, at the 9th China Commercial Aerospace Forum in Wuhan, Zhang Hailian of the China Manned Space Agency publicly outlined a plan to land two astronauts on the Moon by 2030. The crewed landing will use the Mengzhou spacecraft and the Lanyue lander, each launched separately on a Long March 10 rocket, conducting rendezvous in lunar orbit. On the 28th of September 2024, China unveiled the extravehicular lunar spacesuit in Chongqing and asked the public to suggest a name for it.