system
Given the following post, respond as if you're commenting on Reddit:
human
Millions of stars are in the area of a sky covered by a pin's head. How do radio astronomers know which radio waves are coming from which star when they point their radio telescopes to the sky?

 Shouldn't what they get be white noise? Radio waves from millions of stars at different points in space and time arriving together?
gpt
Sadly we currently are not able to detect individual stars that far away. The farther we get outside our galaxy the harder it is to detect individual stars. There are certainly millions and billions of stars out there but we can only see a small fraction of them. We detect galaxies instead and estimate the number of stars.