The Uses of Astronomy - An Oration Delivered at Albany on the 28th of July, 1856 by Edward Everett
page 66 of 72 (91%)
page 66 of 72 (91%)
![]() | ![]() |
|
[Footnote A: _Memoirs of A.A.S._, vol. iii, 275.] THE VASTNESS OF CREATION. But it is when we turn our observation and our thoughts from our own system, to the systems which lie beyond it in the heavenly spaces, that we approach a more adequate conception of the vastness of creation. All analogy teaches us that the sun which gives light to us is but one of those countless stellar fires which deck the firmament, and that every glittering star in that shining host is the center of a system as vast and as full of subordinate luminaries as our own. Of these suns--centers of planetary systems--thousands are visible to the naked eye, millions are discovered by the telescope. Sir John Herschell, in the account of his operations at the Cape of Good Hope (p. 381) calculates that about five and a half millions of stars are visible enough to be _distinctly counted_ in a twenty-foot reflector, in both hemispheres. He adds, that "the actual number is much greater, there can be little doubt." His illustrious father, estimated on one occasion that 125,000 stars passed through the field of his forty foot reflector in a quarter of an hour. This would give 12,000,000 for the entire circuit of the heavens, in a single telescopic zone; and this estimate was made under the assumption that the nebulæ were masses of luminous matter not yet condensed into suns. These stupendous calculations, however, form but the first column of the inventory of the universe. Faint white specks are visible, even to the naked eye of a practiced observer in different parts of the heavens. Under high magnifying powers, several thousands of such spots are |
|