I understand that the “observable” universe is entirely based on where you are located. Is there a method of determining where you are currently located without being relative to the observer? Everything is currently expanding away from each other, meaning nothing is ever in the “same spot” for very long. How do you know where you actually are in the universe?

Relevant lecture: https://m.youtube.com/watch?v=6kwcokUFaqo

  • florinandreiBEnglish
    1·
    1 年前

    we will freeze your planet and move you to a random time and place in your current observable universe and you must determine when and where you are (say relative to your original location)

    If the planet itself was moved, then what is the “original location” after that?

    Hopefully the aliens can pass a college-level relativity exam, or else the challenge is arbitrary.

    As long as some reference frame is clearly stated, then the challenge would not be arbitrary. There is no “location” without a reference frame - the term is simply undefined.