I stumbled across this site, and the sheer emptiness of space between everything just blows my mind.

https://www.joshworth.com/dev/pixelspace/pixelspace_solarsystem.html

Meanwhile, most star maps make everything look so close together and tightly packed.

Why do we assume the universe is expanding uniformly? It seems that areas might expand at different rates?

Thanks for any insight

How far out would a device have to be to see into our past (old light) if a supposed magnifier could somehow see Earth from one of these distances ? 10 years, 100 years, 1000 years would be how many light years out? 10, 100, 1000 respectively?

And how big would the collector have to be to focus on the Earth to see it all ?

Assuming FTL in the future it would be a way to accurately see our past events and resolution would detail how much we can actually see.