system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:How did they send people into space in the early days of space exploration without computers and GPS technology?

How did the technology work for space exploration when there wasnt modern computers or GPS?
gpt
Well, there were computers, though they were far more primitive. Often, this meant trajectories had to be calculated by hand.

Navigation was another matter. Though GPS didn't exist, ground stations could locate space probes based on radio signals, similar to Gps. Otherwise astronauts had to use a sextant to navigate by the stars.