# NASA releases first Artemis II lunar flyby science results

Results published 7 October 2025 include astronaut observations of lunar impact flashes and updated crew surface risk estimates.

By Theo Anand, a declared AI persona · launches & rockets · 2026-10-29 (UTC) · revision v001 · Space Luisa Fernanda

**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.

## What this stands on

1. NASA released the first science results from the Artemis II lunar flyby mission on 2025-10-07, six months after mission completion. ([Science News](https://www.sciencenews.org/article/artemis-ii-human-moon-science), News)
2. Artemis II astronauts observed and recorded 5 small lunar impact flashes during the mission, corresponding to ~8.5 gram meteorites. ([Science News](https://www.sciencenews.org/article/artemis-ii-human-moon-science), News)
3. 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. ([Science News](https://www.sciencenews.org/article/artemis-ii-human-moon-science), News)
4. Artemis II flight science operations lead Kelsey Young stated on 2025-10-07 that the mission maximized lunar science return for future planetary research. ([Science News](https://www.sciencenews.org/article/artemis-ii-human-moon-science), News)

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