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Tianwen-2 Mission Aims to Collect Samples From Near-Earth Asteroid and Study Rare Comet by 2035, in Unprecedented Operation by China in Deep Space.
China has taken a new step in its space journey. On Wednesday, the 28th, the Tianwen-2 mission was successfully launched, considered the country’s most ambitious in deep space.
The liftoff occurred from the Xichang Satellite Launch Center in Sichuan Province.
Aboard a Long March 3B rocket, the probe departed with two targets: a near-Earth asteroid and, later, a rare comet in the main belt.
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Mission in Two Phases
The Tianwen-2 mission consists of two stages. The first is the encounter with asteroid 469219 Kamoʻoalewa, also known as 2016 HO3.
This small rocky body orbits near Earth and has a diameter of between 40 and 100 meters. Scientists believe it to be a fragment of the Moon. The expectation is that the probe will reach the asteroid in 2026.
After arrival, Tianwen-2 will conduct a surface sample collection. Three different methods will be used, depending on soil conditions: floating collection, probing, and anchored drilling.
The samples are expected to return to Earth in 2027. After that, the mission continues, with a new destination: comet 311P/PANSTARRS, expected to arrive around 2035.
High-Complexity Operation
Navigating to small celestial bodies requires extreme precision. According to ESA engineer Franco Perez-Lissi, these bodies have weak and irregular gravitational fields, preventing the use of traditional orbits.
To successfully collect samples, Tianwen-2 will have to match its speed and rotation with that of the asteroid.
Perez-Lissi compared this operation to “trying to dock a boat with a mountain floating in space that is falling in a really unpredictable and almost weightless manner.” This illustrates the technical challenge involved.
Instruments and Studies
The Tianwen-2 probe is equipped with 11 scientific instruments. Among them are high-resolution cameras, spectrometers, particle sensors, radar sonar, and magnetic field detectors.
The equipment will study the composition, geological characteristics, and interactions with solar wind both on the asteroid and the comet.
This data is expected to enhance knowledge about the formation of the solar system and may even contribute to studies on the origin of life.
Previous missions, such as NASA’s OSIRIS-REx and JAXA’s Hayabusa2, brought substances like amino acids and nucleobases back to Earth.
Expansion of the Chinese Space Program
The Tianwen-2 mission continues China’s advancement in the space sector. It follows the Tianwen-1 mission, which was sent to Mars, and is part of a broader plan.
China has already announced future missions to bring back samples from Mars, study Jupiter, and explore Venus. Plans also include the construction of the International Lunar Research Station and sending astronauts to the Moon.
The Chinese space station Tiangong is already operational, and the country continues to invest heavily in new technologies. According to state agency Xinhua, CNSA chief Shan Zhongde emphasized the expectation of innovative discoveries and advancements in understanding the universe.
A Milestone for the “Space Dream”
With the launch success confirmed by the China Aerospace Science and Technology Corporation (CASC) and CNSA, the Tianwen-2 mission represents a new milestone. The solar panels of the probe were opened correctly, indicating good initial functioning.
By pursuing two distinct celestial bodies — a possible lunar fragment and a hybrid comet — China demonstrates ambition and technical capability.
The project could position the country prominently in the race for scientific knowledge beyond Earth.
The launch of Tianwen-2 reinforces the so-called “Space Dream” promoted by the Chinese government. And if the objectives are achieved, the scientific impact could extend far beyond national borders.
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