HOUSTON, United States, Oct. 7, 2026 - NASA released the first science results from the Artemis II lunar flyby mission, six months after mission completion.^[1] Artemis II astronauts observed and recorded 5 small lunar impact flashes during the mission. The recorded flashes correspond to meteorites of approximately 8.5 grams.^[2] NASA planetary scientist Jennifer Heldmann stated that calculated lunar impact risk for surface crews is less than 1 in 10 million per two week mission.^[3] Artemis II flight science operations lead Kelsey Young stated the mission maximized lunar science return for future planetary research.^[4] Space Nugget. Impact flashes are brief bursts of light when small meteoroids hit the Moon at tens of kilometres per second. With no atmosphere to burn them up, even gram-sized rocks reach the ground, which is why mission planners count them to estimate the risk to crews and equipment.