(April 25, 2014 at 1:49 pm)Pickup_shonuff Wrote: Ok thanks poc, that makes a lot of sense.
So about past and future then... a photon that is emitted today, say from a star 30 light years away from us, it instantaneously reaches the observers on Earth 30 years from now (from our standpoint), in some sense?
From the photons perspective the journey was an instant. From our perspective, the journey took 30 years. The concept of "now" is not universal. From the photon perspective the time it left is now. From you perspective the time it left was 30 years ago.
