Just tried to have a discussion in another forum with a user who tried to tell us that the Sun causes a space-time curvature "of a millionth".

When asked "a millionth of what?" he tried to explain to us that

a) you neither need a zero-point nor another reference point for this to work,
b) in Physics, when dealing with curvatures of space-time, you never use any unit denominators,
c) he knows that this is so because he once talked to a friend of his who is a physicist and
d) you don't need any units anyway because the curvature of space-time is a very abstract concept which you neither can see nor visualize.

Granted, I myself may not be the most knowledgable in this area but the I know that curvatures are usually denominated as "degrees per unit of length" - and given that, from what I know, the curvature has a range from zero to singularity, I dare say that "a millionth" won't cut it.
Not to mention that concepts like "entropy" or "energy" are equally hard to grasp.