The Solar Gravitational Lens will Map Exoplanets. Seriously.

You CAN use for more than 1 target, you just need to reposition the telescope a bit. See [1], is a great great video on the subject. I can't recommend enough [1]: [VIDEO]

The whole concept is that we should launch a fleet of them every few months. Very lightweight semi-autonomous smart lightsails with some optics. The first fleet helps targeting the second, and all those who come after them. [VIDEO] (already linked by a sibling comment, but yes, can't recommend this enough!)

This is the space project that most excites me and the one I most hope we solve in my lifetime. Much more interesting than Mars (not that you can't do both). This video on gravitational lensing blew my mind [VIDEO] What do you think the odds are of if it being done IRL?

Forget Earth gravitational lenses, let's use the sun: [VIDEO] (The whole video is great.) This setup could resolve the surfaces of exoplanets with its ~100 billion magnification. JPL is investigating.

Forget everything else, we need to build THIS : [VIDEO] A telescope array that can use our sun's gravitational lens would enable us to resolve the surfaces of extrasolar planets. We could resolve surface features as small as 10 km across at a distance of 100 light years. JPL is actively investigating this. It's incredibly promising.

Christian Ready made a great video on his Youtube channel, Launch Pad Astronomy, about NASA's plans for a solar gravitational lens. It's got some great graphics and visualisations, and is accessibly narrated. I was inspired and learnt a lot of new ideas. [VIDEO] (23 minutes)

There is a very high quality video about how Solar Gravitational Lens could be used to map exoplanets, and full explanations about the images reconstruction and engineering challenges: [VIDEO]

I actually came across this video on HN a while back: [VIDEO] It explains the extraordinary idea of using the sun as a gravitational lens.