How much more powerful is the Hubble Space Telescope in comparison to some of the earliest telescopes?
Largest earth based telescope is 10 meter in size.
Hubble have a mirror of 2.4 meter only.
Advantage of Hubble is that it is above earths atmosphere.So it can observe with out disturbances from clouds. lightning dust, light pollution etc..
It can observe some infra red and UV rays along with visible light..