You, possibly, imagine that such an anchor makes a difference to science. I rather think of it as a coordinate system. One is easily substituted for another without changing the relative positions of the points.
In other words, the spider web still looks like a spider web, no matter what the draglines are anchored to.
The metaphor is tensile, but can be over-stressed. Draglines anchored to water etc. is a ship afloat etc.
The human choice that adopts a coordinate system as a spatial template which indeed allows for substitutions for a point of origin, must be differentiated from the choice involved in the elected position of origins on that template. Of these two choices, the second election is often regarded as autonomous from first. One could say that the second election is imagined to be a first premise. But no point is autonomous from, for example, non-spatial reality which the template does not interpret, even though it can be self-consistent and self-referential. The relative stability of isolated analyses invites the abuse of reason which substitutes kinds of choices (different than possible points on a graph).