For both technical and scientific reasons (e.g., fundamental limitations of optical resolving power), there are things which cannot be seen via JWST or any othe

For both technical and scientific reasons (e.g., fundamental limitations of optical resolving power), there are things which cannot be seen via JWST or any other near-Earth telescope which a probe might be able to observe. There are also observations which extend beyond the electromagnetic spectrum itself, or sample physical conditions in the neighbourhood of outer-solar-system planets. (These are not knocks on JWST which is absolutely phenomenal for what it does. These are simply observations on the limits of JWST or any comparable near-Earth telescope or remote-sensing resources.)