Due to this expansion, scientists on Earth can observe the light from a galaxy 30 billion light-years away even though that light has traveled for only 13 billion years; the very space between them has expanded.
Denna expansion förklarar hur jordbundna forskare kan observera ljuset från en galax 30 miljarder ljusår bort, även om det ljuset bara har rest i 13 miljarder år; själva rymden mellan dem har expanderat.