New Lunar Crater Larger Than Colosseum Astounds Science

The discovery of a new crater on the Moon, larger than Rome's Colosseum, has put the topic at the forefront of scientific discussions. The impact occurred between April and May 2024 and was only identified by comparing images from the Lunar Reconnaissance Orbiter (LRO) probe.

How the Crater Was Identified

Scientist Robert Wagner, from the LRO team, noticed an unusually large bright spot when analyzing images from October 2025. Comparison with previous photos revealed the presence of a depression 222 meters in diameter and 43 meters deep, named McGetchin crater.

Characteristics of McGetchin Crater

With an extent of 222 meters and a depth of 43 meters, the new formation is three times larger than the previous record-holding crater. The impact generated a dark halo around it and altered the reflectivity of the lunar regolith.

Cold Zone Around the Crater

LRO thermal sensors detected a cold area of about 7 to 9 °C around the crater, up to 6.4 km in diameter. The less dense regolith retains less heat, creating a notably colder zone during the lunar night.

Frequency of Impacts of This Magnitude

Studies indicate that collisions capable of creating craters over 200 meters occur on the Moon approximately every 130 to 132 years. This interval makes the event rare, but expected within geological timescales.

Relevance for Future Missions

Continuous mapping of the lunar surface provides essential information for planning inhabited bases and robotic module landings. Knowing the frequency and effects of recent impacts helps define safe routes and design shielding against fragments.

With information from Estadão, Jornal O Sul, Brasil 247.