Scientists have made a remarkable discovery of a crater on the moon that surpasses the size of the Roman Colosseum. This massive crater, measuring 222 meters across and up to 43 meters deep, is the largest known impact crater in the solar system formed recently.
This significant event is estimated to occur approximately once every 132 years, providing valuable insights as NASA plans to establish a base for astronauts on the moon. In a study published in the journal Science Advances, researchers highlighted the rarity of this event, describing it as a unique and valuable observation.
The Lunar Reconnaissance Orbiter (LRO) operated by NASA detected the crater on the moon’s near side in May 2024, following an impact from an asteroid or comet fragment. Surprisingly, this lunar strike went unnoticed by telescopes on Earth and in space.
Named after Thomas McGetchin, a former director of Houston’s Lunar and Planetary Institute, the crater has altered the lunar landscape significantly, covering an area of over 100 kilometers. According to Mark Robinson, the chief scientist for LRO’s cameras, the impact ejected dust and rocky soil at a higher angle than anticipated.
A separate study revealed a seven-kilometer-wide cold spot surrounding the new crater, indicating a disturbance in the moon’s topsoil. Co-author David Paige from the University of California, Los Angeles, likened this process to gardening, explaining how impacts churn the regolith, the loose material covering the bedrock.
The LRO’s findings since its launch in 2009 suggest that the moon’s top layer of soil is overturned by ejected material every 80,000 years, a faster rate than previously believed. Contrary to popular belief, the footprints left by Apollo moonwalkers will not endure over time, as they are expected to fade within this timeframe.
Looking ahead, researchers aim to assess the potential risk of ejected crater material affecting NASA’s future moon base. By understanding these dynamics, engineers can enhance the base’s resilience to potential damage, ensuring a safer environment for future lunar missions.
