No I hadn't heard of 1st Keplar Law but I just looked it up. Interesting.
As to Truth I define it as an operating principle or law. Thus a truth cannot be physically seen but it can be tested and thus seen to be true. The subject of physics has physical universe laws or principles. Mathematics has it's own principles from which all those fancy calculations can then be made.
Do you think that spirituality, then, also has these laws or principles? I ask because I was reading a book on Buddhist teachings yesterday that would seem to argue the opposite.