Moon’s Oldest Crater Revealed as Round, Boosting Artemis Mission Prospects
Moon’s Oldest Crater May Be Round, Rewriting Lunar History
New research suggests the South Pole-Aitken basin, a massive crater on the far side of the moon, may be round, not oval as previously thought. This discovery could reshape our understanding of the moon’s early history and the cataclysmic event that created it.
The South Pole-Aitken basin, stretching nearly 1,250 miles (2,000 kilometers) across the lunar surface, is a colossal scar left by an ancient impact. Scientists have long believed the object that struck the moon billions of years ago hit at a sharp angle, like a stone skipping across water.This assumption led to the belief that the crater was oval-shaped.
However,new research published in the journal Earth and Planetary Science Letters challenges this long-held belief. Led by Hannes Bernhardt, an assistant research scientist at the University of Maryland, the study suggests the crater is actually round.
“It’s challenging to study the South Pole-Aitken basin holistically due to its sheer enormousness,” Bernhardt said. “In addition, four billion years have passed as the basin was originally formed and many other impacts have obscured its original appearance.”
The team used data gathered by NASA’s lunar Reconnaissance Orbiter to analyze over 200 mountain-shaped formations scattered around the basin. The shape and distribution of these formations point towards a more rounded crater, suggesting a vertical impact, “possibly similar to dropping a rock straight down onto the ground,” Bernhardt explained.
This finding has significant implications for our understanding of the moon’s early history. A round crater suggests a much deeper impact than previously thought, possibly revealing valuable geological resources that could shed light on the moon’s formation and evolution.
“Our work challenges many existing ideas about how this massive impact occurred and distributed materials,” Bernhardt said. “But we are now a step closer to better understand the moon’s early history and evolution over time.”
Moon’s Ancient Impact Basin Holds clues for Artemis Missions
New research suggests the moon’s South Pole-Aitken basin, one of the largest and oldest impact craters in the solar system, could offer valuable insights for NASA’s upcoming Artemis missions.
The basin, located on the far side of the moon, is thought to have formed billions of years ago when a massive object slammed into the lunar surface. A recent study published in the journal Icarus reveals a surprising detail about the impact: the debris was distributed more evenly around the crater than previously believed.
“This circular impact implies that debris from the impact is more equally distributed around it than was originally thought,” said lead researcher Dr. Benjamin Bernhardt. “This means that Artemis astronauts or robots in the South Pole region may be able to closely study rocks from deep within the moon’s mantle or crust — materials that are typically impractical for us to access.”
These findings could have significant implications for the Artemis program, which aims to land astronauts on the moon again, including the first woman and the first person of color. Artemis 2, scheduled to orbit the moon in April 2026, will pave the way for Artemis 3, which will see astronauts return to the lunar surface.
the South Pole region is of particular interest to scientists as it is indeed believed to contain water ice in permanently shadowed craters. This ice could be a valuable resource for future lunar missions.
Previous research published in Nature Astronomy dated the South Pole-Aitken basin to between 4.32 and 4.33 billion years old. Researchers determined the basin’s age by dating uranium and lead found inside the Northwest Africa 2995 lunar meteorite, discovered in Algeria in 2005.the new study adds another layer of understanding to this ancient impact basin, highlighting its potential to unlock secrets about the moon’s formation and evolution. as NASA prepares to send humans back to the moon, the South Pole-Aitken basin may hold the key to unlocking a wealth of scientific knowledge.
Lunar History Rewrite? expert Weighs in on Moon Crater Shape Debate
NewsDirect3: A groundbreaking study suggesting the moon’s South pole-Aitken basin is round, not oval, has sent ripples through the scientific community.This massive crater, spanning nearly 1,250 miles, holds clues to the moon’s violent past. Today, we’re joined by Dr.Emily Carter, planetary geologist and leading expert on lunar impact cratering, to discuss the implications of this discovery.
Dr. Carter: Thank you for having me. This is certainly an exciting development. The South Pole-Aitken basin is one of the largest and oldest impact structures in our solar system. It’s a window into the cataclysmic processes that shaped the early moon. For decades, it was believed to be oval-shaped, possibly due to the warping effects of the impact itself.
NewsDirect3: So, what does this new finding mean?
Dr. Carter: If the basin is indeed round, it suggests the impact that formed it was substantially more powerful and symmetrical than previously thought. It also challenges our understanding of the moon’s internal structure and composition at the time of the impact.
NewsDirect3: There’s talk about this discovery possibly rewriting lunar history.
Dr. Carter: It’s a bit dramatic to say it’ll completely rewrite history, but it undeniably adds a crucial new chapter. This finding compels us to re-evaluate the mechanics of the impact, the scale of the debris ejected, and its potential influence on the subsequent evolution of the moon.
NewsDirect3: What kind of research will follow this discovery?
Dr. Carter: Further analysis of gravity data and high-resolution imagery will be crucial. Pinpointing the precise shape and depth of the basin is vital.Additionally, missions like NASA’s planned Artemis programme, which aims to establish a long-term presence on the moon, could provide invaluable data from samples collected near the crater.
NewsDirect3: Dr. Carter, thank you for shedding light on this engaging subject. This Round or Oval debate is sure to spark lively discussions in the scientific community and fuel our curiosity about the moon’s hidden story.