The Source and Mode of Solar Energy Throughout the Universe

A caption lists typical stages in development of a solar system, among others Newton's comet, A.D. 1680, the Comet of 1811 and Donati's comet, 1858. The text says the nebular hypothesis, so called, of Laplace has required much modification, in the light of more recent science, but its essential principles are still generally accepted. By the theory described, the limits of our solar system were once occupied by an attenuated gaseous nebula containing within itself all the matter which now forms our solar system. The text says this great nebular mass, primordially assumed, was given by gravity a slow but gradually increasing rotation upon its center.

The text says the jet prominences last but a short time, rarely an hour and frequently but a few minutes, and are only to be seen in the neighborhood of the spots. The text says that wherever there are jet prominences there also are faculæ. The text says the disassociated hydrogen would form the negative electrosphere of the comet, glowing with its own luminosity, by gaseous incandescence.