We now propose to consider more definitely the nature of that volume of flame, or intense heat, which we denominate the Sun. Of its temperature it is difficult to form an estimate the least comprehensive. We know our furnace heat will fuse cast-iron at a little less than 3,000 degrees. Oxy-hydrogen flame—one of the hottest known—is estimated at about 14,000 degrees Fahrenheit, while the temperature ascribed to the Sun is about 12,000,000. There is nothing our senses can realize, or our minds conceive, that will enable us even to approximate the intensity of this heat.
Now we have seen that the Sun is the source of all light and heat; the source—when the element is concentrated—of that which we denominate fire. The phenomena that fire pervades, by some of its constituents, every thing, and all space, is incomprehensible otherwise than in the belief that the Spirit of God is everywhere. Although fire is always on this Earth in a concentrated form, yet its source is the Sun, and from this source we can concentrate it into visible ignition. And yet we see that the element itself is ethereal; it will consume by combustion, yet its heat and flame always tends upward, and disappears in its own ethereal element, and we can recognize no solid substance in it. We can feel and realize its warmth and vivifying influence; we enjoy the light, as one of its productions, yet all are ethereal, and we cannot grasp, mould, or retain it. We know that the Sun—that volume of heat—is the active source and agency of life and animation, and it imparts its blessings to us in a thousand ways; yet, misused, it proves the source and element of punishment and destruction.
We have said that light and heat are the two great stimulants of vital force. These two stimulants are inseparably connected. Heat is the source of light, and without heat there would be no light, for even reflected light is derived from this source; this is manifest to every intelligent mind. Therefore, we see plainly that the Sun is the source and mainspring of all animation, and to its influence, directed and controlled by the Allwise Creator, are we indebted for every blessing—nay, even life itself. It acts upon the elements appointed unto it, and brings forth all animation. It causes the earth to yield her productions; clothes the forest with green, gives to the "rose" and the "lily" their beautiful tints and fragrance, and imparts to the flowers of garden and forest their thousand variegated hues. It gives to man his strength and wisdom, and to woman her beauty and loveliness, and—with refined and cultivated intellect—her ten thousand charms.
THE PLANETS OF OUR SOLAR SYSTEM.
Let us now turn our attention, for a short time, to the contemplation of the planets, or worlds, belonging to our own solar system; those within the domain of our own Sun, and to which it dispenses light and heat. With these, our Astronomers are, so to speak, quite familiar. We cannot do better than to present them to you in the language of Dr. Child, whose writings have afforded us so much correct data in preceding pages.