China’s new moon mission could unlock secret of lunar ice: Why that matters | Space News
China Prepares for Launch of Ambitious Chang’e-7 Lunar Mission
China is set to launch its latest unmanned lunar mission, Chang’e-7, as early as Monday morning, targeting the search for ice water in the permanently shadowed craters of the moon’s south pole. This mission represents China’s seventh lunar endeavor and is considered its most ambitious to date.
The launch window for Chang’e-7 extends from August 24 to August 31, allowing flexibility for liftoff during that period. The mission will deploy a suite of spacecraft, including an orbiter, lander, rover, and a unique hopper.
The orbiter will serve as the mission’s primary spacecraft, remaining in lunar orbit to map the surface and relay data between the mission components and Earth. It will capture images and provide critical communication support throughout the mission duration.
The lander, equipped with scientific instruments, is set to touch down near the Shackleton Crater, a 21-kilometer-wide pit close to the lunar south pole. This site is significant, as previous lunar missions have not approached this area.
A small robotic rover will traverse the landing site, conducting analyses of the local environment, including soil and rock samples. Meanwhile, the hopper, a solar-powered vehicle, is designed to “hop” short distances on the lunar surface, allowing for targeted exploration of the Shackleton Crater.
Evidence of Water on the Moon
Over the past two decades, numerous space missions have confirmed the presence of water on the moon. Speculation about lunar water began in the 1960s, but initial Apollo samples appeared dry. A significant breakthrough occurred in 2009 when NASA intentionally crashed a rocket and probe into a shadowed crater, providing clear evidence of ice water in the lunar regolith. Further studies in 2020 revealed that water is more widespread than previously believed, with molecules found encased in mineral grains and potential ice patches in permanently shadowed areas.
NASA defines these permanent shadows as areas within deep craters at the lunar poles where sunlight has not reached for potentially millions of years. Previous mapping efforts have identified water ice in these regions.
The Importance of Lunar Water Exploration
Understanding the distribution and accessibility of water on the moon is vital for several reasons. Ancient polar ice may hold records of lunar volcanic activity and the historical delivery of water by comets and asteroids, offering insights into the formation of Earth’s oceans. Moreover, accessible water could provide drinking supplies for crewed lunar missions and aid in cooling equipment. It also has potential uses in fuel production through hydrogen extraction and oxygen for breathing, supporting future missions to Mars or lunar resource utilization.
Legal Considerations Regarding Lunar Water Ownership
The 1967 United Nations Outer Space Treaty prohibits any nation from claiming sovereignty over the moon. While it does not explicitly ban commercial activities, it mandates that such operations be authorized and supervised by national authorities, leaving questions about resource ownership largely unresolved.
Recent Missions to the Lunar South Pole
Earlier this year, Russia’s Luna-25 mission was also launched to investigate frozen water at the moon’s south pole. However, the mission ended prematurely when the spacecraft spun out of control and crashed, preventing any scientific data collection.
In contrast, India’s Chandrayaan-3 successfully landed in August 2023, providing critical new data on the presence of water on the lunar surface through soil temperature readings.
Challenges of South Pole Exploration
Exploring the moon’s south pole presents significant challenges due to its rugged terrain filled with craters and deep trenches. This region is distant from the equatorial zone where previous missions, including the Apollo landings, have focused.
Innovative Aspects of the Chang’e-7 Mission
The Chang’e-7 mission is designed to provide more detailed information about the locations and depths of water deposits within the moon’s south pole craters. The mission’s hopper will uniquely enable exploration by jumping into and out of these challenging environments, an approach not used by any previous lunar mission.
