A signal sent yesterday won't arrive until tomorrow.
Voyager 1 launched in 1977, and it has never stopped moving. Right now it sits over 24 billion kilometres from Earth — so far that its radio signal, travelling at the speed of light, takes more than 22 hours to reach our dishes. We sent a message into the dark, and the dark keeps whispering back. It crossed the heliopause in 2012, leaving the Sun's entire bubble of influence behind and entering true interstellar space — the first human-made object ever to do so. It runs on a nuclear battery, steadily fading, and it carries the Golden Record: sounds, music, and greetings, preserved for whatever might one day find it. We haven't lost it. We're still listening. Follow Deep Field Vault for more of the universe.