system
Given the following post, respond as if you're commenting on Reddit:
human
How big of a telescope would you need to see a man on the moon?
gpt
A two meter person at 400,000 km subtends about 0.001 arc-seconds. The resolution of a telescope is roughly the ratio of the wavelength of the light it's looking at to the diameter of the telescope. To resolve something that small at 500 nm wavelength you'd need about a 100 meter telescope, several times larger than what currently exists. And then, the person would just appear as a blurry dot.