IMO The image  not only has no encyclopedic value whatsoever, it has a negative value. What one could possibly learn from that image? The only thing that could be learned from this image is how not to take a similar image in order do not damage both your camera and your eyes. The image quality is horrible. It is full of camera artifacts.On the other hand the image  is highly encyclopedic. It shows not only the sun, sunspots and Mercury, but also Limb darkening. The image is a great illustration of the size of the Sun compare to Mercury. It is easy to correct the caption under the image and provide  the link to the Mercury transit article. Then maybe somebody would go there and learn something new.