From Rudi Van Nieuwenhove
An often-observed characteristic of a good scientific theory is that its governing equations have some aesthetic structure. This is certainly not the case for the relativistic theory known as modified Newtonian dynamics, or MOND (29 April, p 52), where agreement with observations is only obtained after fiddling and adding enough fields. Will yet another field be added next time a discrepancy between MOND and observations is found? Even if the “Pioneer effect” is real, it is certainly no proof that MOND is the correct explanation. It just means that a force of some kind is missing from our calculations.
Halden, Norway
