[cripplecreek]

All that radioactive dust would have floated around and eventually got back into the Earth’s atmosphere...maybe years later.

Most of the dust it kicked up would have fallen back to the moon. Besides tons of naturally occurring radioactive space dust falls to the earth every year.

[Erasmus]

Some of it would fall back; but the escape velocity from the Moon is so low that much or most (I certainly don't know how much) would escape the Moon, but not the Earth-Moon system.

I am guessing that thousands of tons of fine ejecta would circulate around the Earth and Moon for many years, with a small percentage getting captured by Earth and its atmosphere every year, day, week, hour, or what have you. It is not clear to me if this would be a significant loading of our exoatmosphere with radionuclides. It would lose its radioactivity at about the speed of any Earthbound nuke site.

[GraceG]

All that radioactive dust would have floated around and eventually got back into the Earth’s atmosphere...maybe years later.

Most of the dust it kicked up would have fallen back to the moon. Besides tons of naturally occurring radioactive space dust falls to the earth every year.

Yup, we think we would do “so much damage” to the moon by putting a nuke on the moon....

Hubris, thy name is humanity!