If Einstein says gravity bends space/time, how can we detect gravity?
Nope–we would see the meteor’s path deflected and wonder how the heck that happened if we didn’t have Newton and then Einstein to explain it. But from the meteor’s point of view (or frame of reference), if we could ask it a question, it would report that it feels like it’s traveling in a straight line, and it has no idea why objects outside of its frame of reference appear to have shifted position. Neither the meteor, nor astronauts, experience traveling in a curved path, except for visual clues. Take away those visual clues, which are received in the form of photons traveling at the speed of light, and each would swear on a stack of bibles that they’re traveling in a perfectly straight line.
