The LUVOIR space telescope would enable us to characterize the atmosphere of exoplanets and look for biosignatures.

LUVOIR would also provide up to about 25 km imaging resolution in visible light at Jupiter, permitting detailed monitoring of atmospheric dynamics in Jupiter, Saturn, Uranus, and Neptune over long timescales. It can provide sensitive, high-resolution imaging and spectroscopy of Solar System comets, asteroids, moons, and Kuiper Belt objects that will not be visited by spacecraft in the foreseeable future can provide vital information on the processes that formed the Solar System ages ago. It could help study geysers from the ocean moons of the outer Solar System, in particular Europa and Enceladus, over long timescales.