3 ms·
Yes it does, look at the caption of Fig. 1: "Photons we receive that were emitted by objects beyond the Hubble sphere were initially receding from us (outward s
by ziofill 2y ago
Yes it does, look at the caption of Fig. 1:
"Photons we receive that were emitted by objects beyond the Hubble sphere were initially receding from us (outward sloping lightcone at t <∼ 5 Gyr). Only when they passed from the region of superluminal recession vrec > c (gray crosshatching) to the region of subluminal recession (no shading) can the photons approach us".
I can’t reply to your last reply. I agree, in fact I said those regions can be still causally connected to us, not that they are.
- adastra22 2y agoIt shows that SOME “superluminal” photons can reach us, not that ALL can. With accelerating expansion, eventually all galaxies fall out of that interval and become unreachable.
- nyrikki 2y agoThose photons aren't superluminal, the are in our past light cone, they were headed out way before the emitter was beyond the horizon. It gets complicated because the concept of 'now' is a local property and because those objects aren't moving away ftl, space is expanding.