Chapter 13 No.13

THE SUN-continued

The various parts of the Sun will now be treated of in detail.

I. Photosphere.

The photosphere, or "light-sphere," from the Greek φ?? (phos), which means light, is, as we have already said, the innermost portion of the sun which can be seen. Examined through a good telescope it shows a finely mottled structure, as of bril