They had been found at the Apollo 12 and Apollo 14 landing sites but not at the Apollo 11 site, which was about 1,000 km to the east of the Apollo 14 site.
在阿波罗12号和阿波罗14号着陆点都发现了它们，但在距阿波罗14号东面1000公里处的阿波罗11号着陆点却没找到。