In the same way as the corona, the chromosphere and prominences were for a time supposed to belong to the moon.
Beneath the chromosphere is the layer of the sun from which emanates the light by which we see it, called the photosphere.
Slender columns can ordinarily be seen to connect the surface of the chromosphere with its outlying portions.
Just above the reversing layer lies the chromosphere, which is between five thousand and ten thousand miles in depth.
They are, in fact, thrown up from the chromosphere like gigantic jets of incandescent material.
One more picture of prominences (Fig. 80) is introduced to show the continuous stretch of chromosphere out of which they spring.
The Corona lies next in order outside the chromosphere, and is, so far as we know, the outermost of the accompaniments of the sun.
The wave-lengths of some 700 lines belonging to the chromosphere and prominences were determined by the British parties.
The outer surface of the chromosphere is not by any means even.
These and other gases form a shell round the Sun, about 3000 miles in depth, to which the name "chromosphere" has been given.