Transit of Mercury observed 6 November 1993 Left: a full-Sun soft X-ray image, showing the track of Mercury during the transit. The box shows the field of view of the observations in the right panel.
Right panel. Eight snapshots during the transit. Mercury can be seen as a dark silhouette.
The left of the dark notch (a coronal hole) a flaring coronal bright point can be seen in the upper two or three frames. Submitted by S. Freeland and H. Hudson, 21 Dec. 1993