Humans have never visited another planet, but we can send special spacecraft called probes to visit them for us! One of those probes, called Voyager 1, has gone deeper into space than any other, and it's sent us some amazing pictures...

Insane (for the time) Voyager engineering.

Pioneer 10, the first space probe to leave the solar system, provided crucial data about Jupiter and Saturn, which led to advancements in the design of future probes. It continued to send information about the Sun and the solar wind...