Antikythera is the name of the location where the archeological discovery of the mechanism was made. Its origins are unknown.
Thus the mechanism has no relation to the sanskrit word.
Thus the mechanism has no relation to the sanskrit word.
We clearly do not know all the causal elements involved, plus I wouldn't be surprised if the name of the island itself had something to do with "antariksha".
Also just realised that I am replying to a sock puppet account. Thanks anyway.