In part 2 of gravitational lensing, we move from subtle distortions to the spectacular phenomena of strong gravitational lensing. We dive into the Euclid space telescope's discovery of a nearly complete Einstein ring in galaxy NGC 6505. Joining us again is Dr. Georgios Vernardos to discuss how we "delens" the universe and what these rings reveal about spacetime.

We explore the research process of solving mathematical "inverse problems," finding common ground between cosmological imaging and geophysical inversions. From the 19th-century history of NGC 6505 to the hunt for dark matter subhalos, this episode bridges the gap between theoretical relativity and the massive deluge of data currently reshaping our understanding of the cosmos.

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