What immensity of space! What quantity of matter! For independently of the planets, there is a probability of the existence of 400 or 500 comets, perhaps larger than the earth, which run over the different regions of this vast sphere of which the terrestrial globe only constituting a part, a unity on 191,201,612,985,514,272,000, a quantity represented by numbers, which imagination cannot attain or comprehend. Nevertheless, this enormous extent, this vast sphere, is yet only a very small space in the immensity of the heavens; each fixed star is a sun, a center of a sphere equally as extensive; and as we reckon more than 2000 of these fixed stars perceived by the naked eye, and as with telescopes we can discover so much the greater number as these instruments are more powerful; the extent of the universe appears to be without bounds and the solar system forms only a province of the universal empire of the Creator; an infinite empire like himself. Sirius, the most brilliant fixed star, and which for that reason may be regarded as the nearest sun to our's, affords to our sight only a second of annual parrallax on the whole diameter of the earth's orbit, and is therefore at the distance of 6,771,770, millions of leagues distant from us, that is, 6,767,216 millions of leagues from the limits of the solar system, such as we have assigned it after the depth to which the comets immerse. Supposing then, there is an equal space from Sirius to that which belongs to our sun, we shall perceive that we must extend the limits of our solar system 742 times more than it is at present, as far as the aphelion of the comet, whose enormous distance from the sun is nevertheless only a unit on 742 of the total diameter of the solar system. Leagues. Distance from the earth to the Sun 33,000,000 Distance from Saturn to the Sun 313,000,000 Distance from the aphelion of the Comet to the Sun 4,554,000,000 Distance from Sirius to the Sun 6,771,770,000,000 Distance of Sirius to the point of the aphelion of the Comet, supposing that in ascending from the sun the comet pointed directly towards Sirius (a supposition which diminishes the distance as much as possible) 6,767,216,000,000 One half the distance from Sirius to the Sun, or the depth of the solar and sircin system 3,385,885,000,000 Extent beyond the limits of the comet's aphelion 3,331,331,000,000 Which being divided by the distance of the comet's aphelion, gives about 742-1/2