consider:

"A" meets "B" they discuss things...

This discussion is mediated by "C"....

with "D" also involved...


Then it is possible for "A" and "B" to disagree on something, even with JUST "C" (or JUST "D") 's mediation; yet reach agreement with the 4th element ("D" or "C").

This "roundabout" route to agreement IS spherical.

Add gravity (coming together) and it is spherical symmetrical.

To see gravity AND spherical symmetrical:

need "cold dark mater" (variations on the 4th element)(imaginary factorisation)(Hawking radiation going backwards in time).

If already have this (very large array optical telescope in Chile) (they factor in each mirror to make it like one giant mirror; and run this back in time when they coalesce 23 nights of obervation) then you need .... (no time to finish this here)

but note:

need a group of stars to see parallax effect;

if use a group of telescopes that are assumed to be able to swap places you get variations...

all the results associated with dark matter might be obtainable by viewing it as a statistical trick caused by parallax interference effects and failure to pay attention to assumptions made in making calculations.