But the telescope enables us to push the numbering of the suns much farther: it opens up to us the depths of the heavens. Instead of the small number of stars which our eyes can see, it shows us a myriad of others, so thickly thronged together that they seem to cover the sky with fine silver sand. Here, for instance (fig. 6), is the aspect which one corner of the constellation of Gemini presents to the naked eye. And here is the same portion of the sky seen by the telescope. By the aid of this wonderful instrument stars of the thirteenth and fourteenth magnitudes have been distinguished. The number of stars of the twelfth magnitude is 9,556,000, which, joined to the number of the same stars proper to the preceding categories, gives a total of more than 14,000,000. In the third magnitude, a total number of 42,000,000 of stars is counted. Thus, reckoning those visible to the naked eye, and by the telescope, we have 56,000,000 of suns, and we stop at this number only because the telescope does not enable us to see smaller stars than those of the fourteenth magnitude. But, let the telescope be brought to greater perfection, and the whole region of the sky will be seen to be covered with this silver sand, with this diamond dust, of which each grain is a sun. And such will be the accumulation of these suns, in the depths of space, that nothing will be seen on the field of the telescope but a luminous network, formed by the agglomeration of the suns, which will appear to touch each other. [Illustration: Fig. 7.--A Corner of the Constellation of Gemini, seen through the telescope.] _Theophilus._ The Infinite is beginning again. Let me shut my eyes. _The Author._ Wait, I have not said all, I have only begun. I am coming to the nebulæ. Here, indeed, you may expect to grow giddy. The telescope has dispersed all the theories on which the different explanations of the nebulæ were built, and has shown us that they are collections of stars, which, in consequence of their excessive number, and their closeness to each other, appear to form a whole, a single vague and continuous brightness. But, when their dimensions and distances are amplified by the telescope, this diffused light transforms itself into a brilliant point, analogous to that presented by the sky, tapestried with small stars, in the same telescope. These nebulæ are groups of enormous numbers of stars, and even their nearness to each other is only in appearance. They are, in reality, separated by enormous distances, and it must not be supposed that they are all in the same plane; they belong, on the contrary, to very unequal depths in space, and it is only an optical effect which gathers them together on the field of the telescope in the same apparent plane. The nebula of the _Centaur_ is one of the most wonderful. To the naked eye it is but a dimly-lighted point in the sky; but, looked at through a good telescope, it takes the aspect represented by figure 8.