Fifty Year Old Moon Mystery Explained
ekarjala writes "This article from NewScientist.com explains that a "flash" on the moon's surface that (captured by an amateur photographer 50 years ago) was probably the result of a 20 meter asteroid hitting the moon's surface."
The meteors in these cases were in probably in the 10 kg range, and the craters they produced were probably a few meters across (not large enough to see from the ground or any lunar orbiter we are likely to launch any time soon).