4 ms·
A question came to mind: where do the photons go if it gets past the end of the observable universe?
by m3kw9 5y ago
A question came to mind: where do the photons go if it gets past the end of the observable universe?
- jeremyjh 5y agoThe observable universe is simply what exists in our light cone - what can reach us before the space between is expanding faster than the speed of light. There is no reason to think there is anything special about us or our light cone and no reason to think things outside it would look different to an observer nearer to them.
- Aperocky 5y agoit can't get there. At least the ones that are emitted from us. Similarly, the ones that are emitted by stuff beyond that boundary will never get to us. Because the space is stretching faster than the photon.