Re: Weight
"No, technically it 'massed' 1.73 kg on the Moon as well, since kg is the SI unit of mass."
True, however it also 'weighed' 3.8lbs since, as everyone knows, a pound is a measure of force (like the Newton) and the actual imperial unit of mass is the slug.
Hmmmm... I sense an opportunity. El reg should add the slug as a unit of mass (e.g., 1 adult badger == 130.4347 banana slugs).
However, I note that el reg has also intermixed measures of weight and mass. We need a purifying revamp of the standards!