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How a Cosmic Collision Reshaped the Moon in Just 10 Minutes

by nasaspacenews
February 4, 2025
in Astronomy, Astrophysics, Moon, News, Others
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The moon. Source Own work Author Gregory H. Revera

The moon. Source Own work Author Gregory H. Revera

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The Moon holds a violent history of cosmic collisions, but a recent discovery has unveiled an asteroid impact that reshaped its landscape in an extraordinary way. Scientists have found that an asteroid, about 15 miles (25 km) wide, struck the lunar surface approximately 3.8 billion years ago, creating two massive canyons on the Moon’s far side.

An Impact of Cosmic Proportions

One of the most intriguing aspects of this discovery is the scale and speed at which these canyons were formed. The asteroid’s impact unleashed an explosion 130 times more powerful than the world’s entire nuclear arsenal combined. The debris from this cataclysmic event was ejected at nearly 1 mile per second (1.6 km/s), carving out two Grand Canyon-sized chasms in under 10 minutes.

For comparison, Arizona’s Grand Canyon took millions of years to form through erosion by the Colorado River. In contrast, this lunar event demonstrates how a single moment of extreme violence can permanently alter a celestial body’s landscape.

According to David Kring, the lead author of the study from the Lunar and Planetary Institute in Houston, this was “a very violent, a very dramatic geologic process” that reshaped a significant portion of the Moon’s far side.

Mapping the Aftermath: How Scientists Discovered the Lunar Canyons

The discovery was made possible through data collected by NASA’s Lunar Reconnaissance Orbiter (LRO), a spacecraft that has been mapping the Moon’s surface in incredible detail since 2009. Researchers used high-resolution images and topographical data to trace the aftermath of the asteroid strike, identifying the massive canyons—Vallis Planck and Vallis Schrödinger.

These canyons are up to 174 miles (280 km) long and 2.2 miles (3.5 km) deep, making them some of the most impressive geological formations on the Moon.

Scientists were able to calculate the asteroid’s trajectory and impact zone, confirming that it passed over the lunar south pole before colliding with the far side. The impact formed a giant basin and sent huge chunks of rock flying across the Moon’s surface, with most of the debris moving away from the south pole.

Why This Discovery is Crucial for NASA’s Artemis Missions

The Artemis program, NASA’s ambitious plan to return humans to the Moon, aims to land astronauts near the lunar south pole by the end of the decade. This discovery is great news for these missions because it confirms that the south pole region was not buried under asteroid debris.

This means that pristine lunar rocks, which are over 4 billion years old, remain exposed and untouched. These ancient rocks can provide a valuable record of the Moon’s formation and evolution, and even offer clues about Earth’s early history.

The Moon’s South Pole: A Prime Destination for Exploration

The lunar south pole has long fascinated scientists because it contains permanently shadowed craters that may hold vast amounts of water ice. This water ice could be a game-changer for future lunar missions, serving as a source of drinking water, oxygen for astronauts, and hydrogen fuel for rockets.

Understanding the geology of this region is crucial for planning long-term lunar exploration. If NASA’s Artemis astronauts can confirm the presence of water ice and study these ancient rocks, they could help unlock secrets about the Moon’s past and its potential for human colonization.

What We Can Learn from the Moon’s Ancient Impact Craters

Impact craters are natural time capsules that preserve records of cosmic collisions. Studying these canyons can help scientists:

  • Understand how the early solar system evolved
  • Determine the role of asteroid impacts in shaping planetary surfaces
  • Assess potential hazards for future missions to the Moon and Mars

How the Artemis III Mission Could Change Lunar Science

The Artemis III mission, scheduled for mid-2027, will land astronauts near the lunar south pole for the first time in over 50 years. This mission will allow:

  • Direct analysis of ancient lunar rocks
  • Exploration of permanently shadowed craters for water ice
  • Testing of technologies for sustainable lunar living

Could the Moon’s Canyons Hold More Surprises?

Another exciting possibility is that these canyons may contain even more hidden geological secrets. Scientists aren’t sure whether Vallis Planck and Vallis Schrödinger are permanently shadowed like some of the craters near the Moon’s south pole. If they are, they could contain trapped ice deposits, much like the polar craters.

Looking to the Future: What’s Next for Lunar Exploration?

This discovery is just the beginning. With new missions and cutting-edge technology, scientists hope to unravel more mysteries about the Moon and its dynamic past.

Upcoming missions like:

  • NASA’s Artemis program (aiming for sustainable lunar exploration)
  • The European Space Agency’s lunar water ice mapping missions
  • China’s planned crewed Moon landing

will all contribute to a new era of space exploration.

Final Thoughts

The discovery of two Grand Canyon-sized chasms on the Moon is not just a fascinating insight into our celestial neighbor’s history—it has real implications for NASA’s Artemis missions, lunar exploration, and even planetary defense.

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Reference:

Grand canyons on the Moon

Tags: ancient MoonArtemis programasteroid impactfuture space travellunar canyonslunar explorationlunar south polemoon geologyMoon impact cratersMoon researchNASANASA Artemisplanetary defenseplanetary geologyspace discoveryspace missionsspace scienceVallis PlanckVallis Schrödingerwater ice on Moon

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