Well, it turns out that if we were to zoom in at radio wavelengths, we'd expect to see a ring of light caused by the gravitational lensing of hot plasma zipping around the black hole.
Ternyata jika kita memperbesarnya sebesar panjang gelombang radio, kita bisa melihat lingkaran cahaya karena gravitasi membuat plasma panas menyelubung menutupi sekitar lubang hitam.