system
Given the following post, respond as if you're commenting on Reddit:
human
How fast would I have to travel around the world to have a perpetual sunset?

While admiring the sunset last night, this odd question popped into my head. 

(I live near Chicago since latitude is probably a factor)
gpt
Sunset will travel around earth once every ~24h. The circumfence of earth is about 40,000 kilometres; so near the equator (where the fastest speed is required), you'll need to go 40,000 km /24 h = 1,666 km/h or about 1036 mph. Since it is rather expensive to even reach such a speed, you'll want to try it closer to one of the poles.

If nobody else does, I'll probably be back later to calculate it for your latitude.