Here’s Where China’s Sample Return Mission is Headed

Chang'e-6 will land in the Apollo Basin inside the much larger SPA basin. Image Credit: Zeng et al. 2023.

Humanity got its first look at the other side of the Moon in 1959 when the USSR’s Luna 3 probe captured our first images of the Lunar far side. The pictures were shocking, pointing out a pronounced difference between the Moon’s different sides. Now China is sending another lander to the far side.

This time, it’ll bring back a sample from this long-unseen domain that could explain the puzzling difference.

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China is Going Back to the Moon Again With Chang'e-6

China's Chang'e-6 mission launches from the Wenchang Spacecraft Launch Site. Credit: CGTN

On Friday, May 3rd, the sixth mission in the Chinese Lunar Exploration Program (Chang’e-6) launched from the Wenchang Spacecraft Launch Site in southern China. Shortly after, China announced that the spacecraft separated successfully from its Long March 5 Y8 rocket. The mission, consisting of an orbiter and lander element, is now on its way to the Moon and will arrive there in a few weeks. By June, the lander element will touch down on the far side of the Moon, where it will gather about 2 kg (4.4 lbs) of rock and soil samples for return to Earth.

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China's Relay Satellite is in Lunar Orbit

Animation of Queqiao-2 satellite establishing orbit around the Moon. Credit: CGTN

On March 20th, China’s Queqiao-2 (“Magpie Bridge-2”) satellite launched from the Wenchang Space Launch Site LC-2 on the island of Hainan (in southern China) atop a Long March-8 Y3 carrier rocket. This mission is the second in a series of communications relay and radio astronomy satellites designed to support the fourth phase of the Chinese Lunar Exploration Program (Chang’e). On March 24th, after 119 hours in transit, the satellite reached the Moon and began a perilune braking maneuver at a distance of 440 km (~270 mi) from the lunar surface.

The maneuver lasted 19 minutes, after which the satellite entered lunar orbit, where it will soon relay communications from missions on the far side of the Moon around the South Pole region. This includes the Chang’e-4 lander and rover and will extend to the Chang’e-6 sample-return mission, which is scheduled to launch in May. It will also assist Chang’e-7 and -8 (scheduled for 2026 and 2028, respectively), consisting of an orbiter, rover, and lander mission, and a platform that will test technologies necessary for the construction of the International Lunar Research Station (ILRS).

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China and Russia Announce their Future Plans for the Moon, Including a Human Base

Artist rendering of an Artemis astronaut exploring the Moon’s surface during a future mission. Credit: NASA

In the coming years, multiple space agencies will be sending astronauts to the Moon for the first time since the closing days of the Apollo Program. For NASA, this will represent the long-awaited “return to the Moon,” while every other space agency will see it as a tremendous step for their space programs. One thing they all have in common is that this time around, the goal is to build the necessary infrastructure that will allow for a long-term human presence.

However, amid all the excitement of this approaching moment in history are concerns about the lack of an international framework that will ensure our efforts are for the sake of “for all humankind.” Whereas NASA is seeking partners for its Artemis Program through bilateral agreements, Russia and China are pursuing an agreement of their own. They call it the International Lunar Research Station (ILRS), and they too are looking for partners in this endeavor.

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The Largest Crater on the Moon Reveals Secrets About its Early History

Thorium concentrations measured by Lunar Prospector across the vast South Pole–Aitken Basin on the lunar far side are shown here, illustrating how mantle material ejected by an impact event about 4.3 billion years ago is currently distributed across the surface. Warmer colors represent higher concentrations; contour lines are at intervals of 0.5 part per million. Credit: Daniel P. Moriarty III

One of the oldest, deepest, and largest impact craters on the Moon provides a window into the history and makeup of our celestial companion, and needs to be studied in more detail, says a team of lunar scientists. The South Pole-Aitken Basin on the Moon formed from a gigantic impact about 4.3 billion years ago. Scientists say a more detailed analysis of this area will help refine the timeline of events in the Moon’s development, as well as help explain the dramatic differences between the lunar nearside and farside.

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NASA Has a New Challenge to Bring Frozen Samples of the Moon Back to Earth

When astronauts return to the Moon for the first time since the Apollo Era, they will be tasked with conducting some very lucrative science operations. Like their predecessors, this will include a sample-return mission, where they bring back lunar rocks and regolith for study. There have also been proposals that renewed missions to the Moon bring back samples of lunar ice so scientists can determine where the Moon’s water came from.

And it appears NASA was listening and would like some public input on this! To this end, the NASA Tournament Lab and TechConnect Ventures (a n open-innovation platform) have come together to launch the NASA Lunar Deep Freeze Challenge. Basically, NASA is looking for ideas on how cold samples collected in the lunar polar region could be preserved and kept frozen for the return trip to Earth.

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Artemis Missions Should Bring Ice Home From the Moon Too

A map showing the permanently shadowed regions (blue) that cover about 3 percent of the moon's south pole. Credit: NASA Goddard/LRO mission Read more at: https://phys.org/news/2017-01-nasa-solar-storms-soils-moon.html#jCp

During the Apollo Era, astronauts conducted vital science operations on the Moon, which included bringing samples of lunar rocks back to Earth for study. Thanks to the examination of these rocks, scientists were able to learn a great deal about the formation and evolution of the Moon and even found evidence of lunar water. In the coming years, when NASA sends astronauts back as part of Project Artemis, more samples will be returned.

Recently, NASA put out the call for science white papers to help them design a framework for the kind of science operations the Artemis astronauts will conduct. According to one proposal, the Artemis astronauts should not only bring back samples of lunar regolith or rocks but lunar ice as well. By examining them here on Earth, scientists may finally be able to resolve the mystery of where the Moon’s water came from.

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Lunar Landings Will Make it Harder to Study the Moon’s Ice Deposits

Artist's impression of surface operations on the Moon. Credit: NASA

When astronauts return to the Moon in the next few years (as part of Project Artemis) they will be scouting locations and resources around the South Pole-Aitken Basin that will eventually help them to stay there. In this cratered, permanently-shadowed region, water ice has been found in abundance, which could one-day be harvested for drinking water, irrigation, and the creation of oxygen gas and rocket fuels.

A critical aspect to planning for all or this is to consider how future missions may affect the local environment. Based on new research from a team of planetary scientists and engineers, a major risk comes in the form of contamination by lunar landers. In short, exhaust from these vehicles could spread around the Moon and contaminate the very ices the astronauts hope to study.

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NASA Chooses 10 Projects that Will Help it Live Off the Land… on the Moon

Artist's impression of surface operations on the Moon. Credit: NASA

Before this decade is out, NASA plans to send astronauts to the Moon for the first time since the Apollo Era and establish a sustainable program of lunar exploration. In order to ensure that future lunar missions are cost-effective and not entirely dependent on Earth for resupply, NASA is looking for ways to leverage lunar resources – everything from water ice to oxygen-rich regolith – to meet their astronauts’ needs.

This process, known as In-Situ Resource Utilization (ISRU), is a major part of NASA’s plans to explore the Moon in the coming years, as well their long-term plans to send astronauts to Mars. To help them meet this challenge, NASA recently selected 10 proposals through its Small Business Innovation Research (SBIR) and Small Business Technology Transfer (STTR) program to developed ISRU-related technologies.

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China Releases New Pictures From the Surface of the Moon

Image of the Chang'e-4 lander, taken by the Yutu 2 rover. Credit: CNSA/GRAS/Doug Ellison

Ever since it made its historic landing on Jan. 3rd, 2019, the Chang’e-4 mission and its Yutu 2 rover have been busy exploring the lunar surface. Just recently, the mission passed its first year of operations and earned the distinction of being the first rover to travel a record 357.695 meters (1,173.5 ft) on the far side of the Moon. And in between all that, the mission has also provided some truly fascinating images of the lunar surface.

Thanks to a data release issued on Monday (Jan. 20th), the public can now peruse through all of the high-resolution images taken by the Chang’e-4 mission. The data, which was released by the Ground Research and Application System (GRAS) of the Chinese Lunar Exploration Project, includes images of the far side of the Moon that were taken with the lander’s terrain camera and the panoramic camera on the Yutu-2 rover.

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