As far as I know, pretty much everything Einstein ever said about gravity was wrong.
For starters Einstein claimed that information could not be transmitted faster than C. Nonetheless it is well known that gravity propagages instantaneously to within our ability to measure. Any time you ever take one step you are sending a gravitational message of sorts out into the cosmos at infinite speed.
Einstein described gravity as a sort of a four-dimensional differential geometry thing. There is no way to start with that and believe that gravity near our own Earth's surface could ever have changed much within recent geological time. Nonetheless it is an easy demonstration that it has i.e. that the largest dinosaurs would not even be able to stand in our present gravity due to the familiar and simple square/cube problem which prevents 200-lb athletes from competing in gymnastics.
There is also no way to start with Einstein's description of gravity and believe that humans would ever be able to control it, but the Podkletnov experiment is sufficiently real and advanced technological nations all have black projects dealing with gravity control.
So when we send messages to our satellites far out in solar system there is no delay between the time it was sent and received?
In any event, I tend to be philosophical when it comes to mysteries of the cosmos and physics in general. Living beings are perception processors - - and such concepts as 'space', 'time', 'existence', 'life', 'gravity', and well, ...'concept', are simply notions that have evolved and been collectively agreed upon by our species - - and shared to some extent with and among every other living earthly species - - over the course of eons.
So keep looking out into forever for the answers if you wish. It's fun to do, and I have a great deal of respect for the hobby. Estimates of "the size of the universe" (LOL!) will continue to grow every few months or so, and "unexplained mysteries" will pile up, so the hobbyists will always have plenty to keep them busy. As for me, I prefer to look for my answers right here inside my being. First I'd like to figure out to what extent the development of the humans "senses" (touch, sight, hearing, and smell) were a response to habitat (earth) and conversely, to what extent habitat is the result of human senses. (I know - - good luck with that.)
By the way, it will be interesting to see "how big the universe is" once that Hubble replacement gets up there and starts looking into the distance.
>> As far as I know, pretty much everything Einstein ever said about gravity was wrong.
Is there a limit to “pretty much everything ever said”?
Or, it could be for the same reason ancient people were said to live 200+ years - - the earth was spinning faster back then.
And during the time of the dinosaurs, probably much faster.
I remember that Ptolemy’s explanation of how our solar system functions actually worked - up to a point. Eventually it was scrapped of course.
I don’t believe that is correct. He said MASS could not be accelerated to a speed faster than C. As far as I know he said nothing about masless information.