I was thinking about entanglement today and found myself struggling to envision entanglement and relativity working together. If I send entangled electrons out in opposite directions, their states are not determined until one of them is observed. I know that. What if one of them passes through an extreme gravity well so that to an observer on earth, one electron is a year old and the other is a billion years old. When you observe the electron that's been traveling through normal space, is the state of the other known? For when and from what reference frame? If you observe the electron that travelled through the gravity well, would the result be identical?