we learnt about polarisation and how it can help us detect exoplanets as well as their atmospheres. In 2019, scientists captured a blackhole, the Messier 87. Was this using polarisation? If so, how did it capture the image with polarisation and what are scientists trying to do to further study the blackhole?

we learnt about polarisation and how it can help us detect exoplanets as well as their atmospheres. In 2019, scientists captured a blackhole, the Messier 87. Was this using polarisation? If so, how did it capture the image with polarisation and what are scientists trying to do to further study the blackhole?