Those 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 beca

Those 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.