Threshold of time? [closed]

Where is the boundary of time, out in space, where we begin to see back in time, as opposed to having the same time as us here on earth, should there be a zone where this happens?

1 Answer
1

All light is reaching us from events in the past. For local events on Earth, the delay is very small. For cosmic events it can become large, with the resolution of the James Webb Telescope get images nearly 96% of the way back to the Big Bang.

In terms of boundaries, there are cosmological event horizons.

For getting to grips with the implications of relativity, I recommend this interactive online resource: Inside Einstein’s Head.

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