WASHINGTON – While it happened in September of last year, details are just emerging about a huge meteorite that hit the moon.

On Sunday, Feb. 23, the findings were published in the Monthly Notices of the Royal Astronomical Society — part of Oxford University.

The images of the impact were captured on two telescopes in Spain on Sept. 11. The impact is the brightest and largest ever observed on the moon, according to a Royal Astronomical Society news release.

“At that moment I realized that I had seen a very rare and extraordinary event,” said professor Jos