A research team led by Osaka University investigated the formation ages of 59 lunar craters with a diameter of approximately 20 km using the Terrain Camera (TC) onboard the lunar orbiter spacecraft Kaguya.
![](https://scx1.b-cdn.net/csz/news/tmb/2020/asteroidshow.jpg)
Source:
https://phys.org/news/2020-07-asteroid-shower-earth-moon-million-years.html