[camle]

the distance from Earth is liner to each of the galaxies in question, but not necessarily are the Earth and each galaxy colinear. could be a triangle formation, which is my point.

whilst three points define a plane, there's a fourth to consider: the Origin. So now we move from 2 to 3 dimensions. Nowhere in the suppositions given did I see that the Origin, earth and two galaxies are coplanar. therefore they need not be. And that triangle emerges again.

[mvpel]

The distance from Earth is liner to each of the galaxies in question, but not necessarily are the Earth and each galaxy colinear. could be a triangle formation, which is my point.

Presumably when they made these observations at the antipodes of the celestial equivalent of latitude and longitude, the azimuth and elevation. For example, the vicinity of Polaris vs. the vicinity of the Southern Cross constellation could be considered to form a line with the Earth at its center.