tombi123 on 21 September 2009
A law is not an absolute, it is a very well established theory.
Newton's LAWS of motions agree with observations when objects are travelling less than half the speed of light or/and are not in a strong gravitaional field.
The observed orbit of Earth is in agreement with Newton's Laws. The observed orbit of Mercury is not in agreement with Newton's Laws (there is a slight difference). The observed orbit of Mercury is in agreement with the Theory of Relativity.
If an observation contradicts a law, the law needs to be changed/improved. Thats what the Theory of Relativity is; an improvement of Newton's laws.
