A collection of solar images on prints and glass plates. These were taken, in part, at the Royal Observatory, Greenwich, and cover the period 1903 - 1942. The images are taken over the visible spectrum, as well as through Ca II K and H alpha filters. There are four main kinds of image:
- Solar disc image
- Solar limb image (coronagraph images)
- Solar limb and disc image (the superposition of the above two)
- Time series (for events of particular interest, taken through an H alpha filter. There are only a handful of these)