What Is a Moon Crater
A moon crater is a depression on the lunar surface formed primarily by meteoroid impacts. The Moon lacks a substantial atmosphere, so even small objects strike the ground at high velocity, creating craters that range from tiny pits to basins hundreds of kilometers wide. NASA's Lunar Reconnaissance Orbiter has mapped over 100,000 craters larger than one kilometer, providing the most detailed inventory to date NASA Lunar Reconnaissance Orbiter.
Lunar craters are classified by morphology, including simple bowl-shaped craters, complex craters with central peaks, and large multi-ring basins. The diameter of a crater often determines its classification, with craters below 15 kilometers typically simple and those above 100 kilometers usually complex. The Moon's cratering record preserves a timeline of solar system bombardment that is more complete than on Earth because the lunar surface is geologically inactive and does not experience plate tectonics or significant erosion.
Largest Moon Craters and Their Dimensions
The South Pole-Aitken basin is the largest confirmed impact structure on the Moon, spanning roughly 2,500 kilometers in diameter and reaching depths of up to 13 kilometers. It is located on the Moon's far side and is one of the oldest and largest known impact basins in the solar system, with observations from NASA missions confirming its size and asymmetry NASA GRAIL Mission.
Other major craters include the Apollo basins, which are multi-ring structures formed during the Late Heavy Bombardment period approximately 3.9 billion years ago. The Orientale basin, with three distinct rings, is the youngest large impact basin and provides key data on how multi-ring structures form. Impact melt deposits and central peaks in these basins help scientists determine the mechanics of large-scale collisions and the composition of the lunar crust.
Moon Crater Exploration and Scientific Significance
Several space agencies and private companies have prioritized moon crater research for both scientific and resource utilization purposes. NASA's Artemis program aims to land astronauts near the lunar south pole, where permanently shadowed craters may contain water ice that could support future habitats NASA Artemis Program. SpaceX has also developed Starship with the long-term goal of enabling lunar and Mars missions, including potential cargo delivery to crater sites for in-situ resource utilization.
Robotic missions such as the Lunar Crater Observation and Sensing Satellite (LCROSS) confirmed the presence of water ice in permanently shadowed craters near the lunar south pole. The data from these missions informs both scientific models of lunar volatile delivery and practical plans for using local resources to reduce launch mass from Earth. Future crater exploration will focus on drilling, sample return, and deploying instruments to measure subsurface composition Forbes Science.