The photons have spent 12bn years travelling through the universe, and they’re just hitting the Hubble telescope now.
Both objects started moving at the same time but at different speeds and in different directions- on top of this the universe itself is also expanding, so the gaps between galaxies is actually growing, meaning it takes longer for the photons to get here
Both objects started moving at the same time but at different speeds and in different directions- on top of this the universe itself is also expanding, so the gaps between galaxies is actually growing, meaning it takes longer for the photons to get here