I've been learning about relativity, and I'm just starting to wrap my head around what it means for events to be simultaneous in one reference frame, but not simultaneous in another.
Taking as the only given that the speed of light is constant, I've ended up defining events that happen simultaneously in any given reference frame like so:
Events that are simultaneous in a given reference frame are events such that we could release photons in the direction of both events, so that from the point of view of that reference frame, the photons both pass by the location of those events just as they happen, at the same time.
Nevermind if my definition doesn't really make sense...I know I"m not really wording it well, but that's exactly why I'm asking this question.
I'm looking for great, intuitive (or as intuitive as possible) ways to define what it means for events to be simultaneous in any given reference frame, taking into account the constant speed of light in all reference frames.