Astrophysicist Cosimo Bambi proposes sending a tiny spacecraft to study nearby black holes. “Earth-based lasers would blast the [light] sail with photons, accelerating the craft to a third of the speed of light.” https://www.sci.news/astronomy/interstellar-mission-astrophysical-black-holes-14129.html

Astrophysicist Proposes Interstellar Mission to Study Black Holes | Sci.News
In a new paper published in the journal iScience, an astrophysicist from Fudan University discusses the possibility of sending a nanocraft to a black hole at 20-25 light-years from Earth to test the nature of the compact object and fundamental physics in strong gravitational fields.