This is a quick reference with basic numbers about black holes, specific to the EHT's imaging of M87 A*.
Here is a PNG preview. You probably want the high-resolution PDF version.
Please feel free to fork this repo and send pull requests with useful contributions. Or, use the issue tracker to submit a suggestion.
M87 A* imaged by the EHT collaboration.
All other words and figures by Leo C. Stein (@duetosymmetry).