system
Given the following post, respond as if you're commenting on Reddit:
human
How can Hubble see nebula's light years away, but we had to wait till New Horizons to see Pluto?
gpt
The angular size of an object in the sky is roughly (size of object / distance from us).

For the deep space objects we can see with Hubble,

(Size of object / distance of object) >>>>>>>>>> (size of Pluto/distance of Pluto)

Pluto is unimaginably small compared to its distance.