All articles tagged with #space weathering
Researchers using imagery from the Lunar Reconnaissance Orbiter identified a fresh 22‑meter crater on the Moon by comparing images from 2009 and 2012, revealing bright ejecta rays that contrast with the dark surface. The rays will gradually darken due to space weathering, showing that the Moon's surface is still being sculpted today. The finding helps refine current impact rates and aids in calibrating age estimates for lunar terrains.
Samples from asteroid Bennu reveal materials from both within and outside our Solar System, including ancient stardust from other stars, and show that Bennu's surface has been significantly altered by space weathering and hydrothermal processes, providing insights into the early solar system and the asteroid's complex history.
NASA's OSIRIS-REx mission's analysis of Bennu asteroid samples reveals a complex history involving diverse origins, transformation by water and space environment, and signs of impact weathering, providing valuable insights into the early solar system and planetary formation processes.
Research on samples from the Ryugu asteroid, collected by JAXA's Hayabusa2 mission, reveals that even microscopic meteoroids can cause significant damage. These tiny particles, accelerated by solar wind, break oxygen-hydrogen bonds in minerals like serpentine, leading to dehydration. Simulations show that impacts at high velocities can break thousands of bonds, although some atoms may recombine to form water, partially offsetting the damage. The study highlights the role of kinetic energy in chemical reactions on asteroids.