A photo of Fred Hoyle and others in the audience at the 1963 International Symposium on Gravitational Collapse and Other Topics in Relativistic Astrophysics. The picture is grainy, in black and white. Audience members are shown in 3/4 profile, some taking notes and the others looking at a speaker off-camera.
https://files.mastodon.social/media_attachments/files/111/591/563/025/546/504/original/0cfe704c1953911c.jpeg