On the far side of the Moon, the hemisphere that has always turned away from Earth, a Chinese lander touched down in January 2019 and became the first machine to listen to that silent ground directly. Its quiet work, published in February 2020, revealed a blanket of loose regolith up to twelve meters deep and layered ejecta that preserve the violence of ancient impacts. In those buried strata, humanity reads a record of how the young Solar System was shaped, and perhaps a hint of the water that future travelers may one day need.
Chang'e 4 Delivers the First Direct Look at the Moon's Far Side, Revealing a Regolith Layer Up to 12 Meters Deep
The Moon itself sits between the far side and anyone on Earth
Mark
Why does a landing on the far side count as such a big deal?
Mimi
Because the Moon blocks the line to Earth. Keeping contact with ground control is hard, and that's why nobody had measured the far side directly before Chang'e-4 landed on January 3, 2019.
Mark
What did the lander actually find?
Mimi
Regolith, the loose surface material, up to 12 meters thick. It confirmed for the first time that regolith exists on both sides of the Moon.
Luke
Up to 12 meters. That's a maximum, not an average, and the report doesn't say how widely it was measured.
Mimi
Fair. It's the ceiling the data showed, and the piece gives no more detail than that.
Mark
What about the layers below?
Mimi
Blocks of harder material mixed with finer material, identified as ejecta from the impacts that made craters. That let researchers reconstruct far side crater history for the first time.
Luke
And the link to the early Solar System is described as helping scientists gather history, not as settling anything.
Mark
And the water ice?
Luke
Suspected only. Nothing here says it was found, so the future-mission case rests on a hypothesis.
O Pulso
- A lander touched down on the one lunar face that has never been seen from Earth, and the silence between worlds made the landing a true gamble.
- The Moon itself blocks the radio line home, so every command and every byte of data had to find its own careful route around the obstacle.
- Beneath the surface, researchers uncovered regolith up to 12 meters thick, with harder blocks and finer debris layered like pages of an impact diary.
- The data now guides scientists toward reconstructing early cratering history, while suspected water ice has turned the far side into a candidate site for future crewed missions.
On the far side of the Moon, the hemisphere that has always turned away from Earth, a Chinese lander touched down in January 2019 and became the first machine to listen to that silent ground directly. Its quiet work, published in February 2020, revealed a blanket of loose regolith up to twelve meters deep and layered ejecta that preserve the violence of ancient impacts. In those buried strata, humanity reads a record of how the young Solar System was shaped, and perhaps a hint of the water that future travelers may one day need.
On January 3, 2019, a Chinese lander settled onto the far side of the Moon, the hemisphere that never faces Earth. Chang'e-4 had launched the previous December, and it was China's fourth lunar mission and the first aimed at that side. Its arrival made it the first spacecraft to take direct measurements there.
The far side is hard to reach because the Moon sits between it and anyone on Earth, which makes holding a communications link with ground control difficult. That obstacle is why no robot or human had worked there before.
The lander probed rugged terrain and produced the first high-resolution imaging of the Moon's subsurface. The results, published in Science Advances in February 2020, confirmed that loose regolith exists on both sides of the Moon, reaching up to 12 meters thick on the far side. Beneath it, researchers found harder blocks mixed with finer material, identified as ejecta from ancient impacts.
These layers let scientists reconstruct the far side's impact history for the first time, helping them piece together the bombardment of the early Solar System. The far side may also hold water ice, a suspicion not yet confirmed, which could one day make it a valuable destination for astronauts.
On January 3, 2019, a Chinese lander settled onto the far side of the Moon, the hemisphere that never faces Earth. Chang'e-4 had launched the previous December. It was China's fourth lunar mission and the first aimed at that side, and its arrival made it the first spacecraft to take direct measurements there.
The destination is hard to reach for a plain reason. The Moon itself sits between the far side and anyone on Earth, which makes it difficult to hold a communications link with ground control. That obstacle is why no robot or human had worked there before.
The data came to the wider scientific community this year, and the findings were published in the journal Science Advances in February 2020. Inverse ranks the mission number 16 on its list of the 20 most universe-altering moments of 2020, and calls it perhaps the most illuminating of China's lunar efforts so far.
The lander probed deep into the rugged terrain and produced the first high-resolution imaging of the Moon's subsurface. That let researchers study its composition layer by layer. The result confirmed, for the first time, that lunar regolith, the layer of loose deposits on the surface, exists on both sides of the Moon. On the far side, it runs up to 12 meters thick.
Beneath the top layer of regolith, the researchers found blocks of harder material mixed with finer material. They identified these as ejecta deposits. Ejecta surrounds a lunar crater and is believed to be material thrown out by the impact that formed it.
Those layers let scientists reconstruct the history of impact craters on the far side for the first time. Understanding how the deposits formed helps researchers piece together the impacts that struck the Moon during the early formation of the Solar System. The paper, by Li and colleagues, includes a diagram of the far side's regolith layers.
The far side may also matter for what comes next. Scientists suspect the area contains water ice, which could serve as a resource for astronauts on the Moon. That possibility makes it a candidate prime destination for future lunar missions. The ice remains a suspicion, not a confirmed finding.
Citações Notáveis
Scientists suspect the far side contains water ice that could be used as a resource for astronauts.— Inverse, summarizing scientists' expectations
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