system
Given the following post, respond as if you're commenting on Reddit:
human
How does NASA tell a deep space satellite like the Voyagers where to go in our solar system?

How do we send it that message? Also, what kind of coordinates do we give the machine?
gpt
Probes like the Voyager are actually just following a pre planned trajectory, NASA never has to send them coordinates of where to go. When a probe like that is launched it is given enough velocity in order to escape the gravitational pull of the Sun, this is called the escape velocity. NASA just timed the launch such that it's escape trajectory would take it by certain planets on it's way out of the solar system.

Messages are still sent and received to and from deep space probes though they just serve other purposes. Information is sent by something called the Deep Space Network which is a group of large radio antennas separated around the Earth which was designed to communicate with deep space probes such as the Voyager. Information is received on the spacecraft by a radio antenna, a probe like the Voyager has a pretty big dish in order to receive signals that far away from Earth.