I like the ideas of "solar gravitational lensing telescopes" and "lunar crater radio telescopes". The former would place a telescope extremely far from the sun

I like the ideas of "solar gravitational lensing telescopes" and "lunar crater radio telescopes". The former would place a telescope extremely far from the sun and use its gravitational lensing effect, the latter would turn a crater on the moon into a giant radio dish. Here is a link for the latter. https://www.nasa.gov/directorates/spacetech/niac/2020_Phase_I_Phase_II/lunar_crater_radio_telescope/ https://www.nasa.gov/directorates/spacetech/niac/2020_Phase_...