Why the chosen orientation for the M87 black hole image? By now we are all familiar with the official image of the black hole in M87:



Now, in the universe, as far as I know, there is no up and down, nor left and right. All is relative. Hence my question: why the particular chosen angle of the image released? Why not instead release the image as, for example, below? Which is the point of reference chosen in the original image? Is it of any particular significance?
North is to the top and East is to the left. I believe it is a standard image in celestial coordinates.

It is important to standardise so that the image can be compared with large scale features like the M87 jet.