Front Page Titles (by Subject) CHAP. II.: Of the Universe. - The Works, vol. 2 An Essay concerning Human Understanding Part 2 and Other Writings
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CHAP. II.: Of the Universe. - John Locke, The Works, vol. 2 An Essay concerning Human Understanding Part 2 and Other Writings 
The Works of John Locke in Nine Volumes, (London: Rivington, 1824 12th ed.). Vol. 2.
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Of the Universe.
To any one, who looks about him in the world, there are obvious several distinct masses of matter, separate from one another; some whereof have discernible motions. These are the sun, the fixt stars, the comets and the planets, amongst which this earth, which we inhabit, is one. All these are visible to our naked eyes.
Besides these, telescopes have discovered several fixt stars, invisible to the naked eye; and several other bodies moving about some of the planets; all which were invisible and unknown, before the use of perspective glasses were found.
The vast distances between these great bodies, are called intermundane spaces; in which though there may be some fluid matter, yet it is so thin and subtile, and there is so little of that in respect of the great masses that move in those spaces, that it is as much as nothing.
These masses of matter are either luminous, or opake or dark.
Luminous bodies, are such as give light of themselves; and such are the sun and fixt stars.
Dark or opake bodies are such as emit no light of themselves, though they are capable of reflecting of it, when it is cast upon them from other bodies; and such are the planets.
There are some opake bodies, as for instance the comets, which, besides the light that they may have from the sun, seem to shine with a light that is nothing else but an ascension, which they receive from the sun, in their near approaches to it, in their respective revolutions.
The fixt stars are called fixt, because they al wys keep the same distance one from another.
The sun, at the same distance from us that the fixt stars are, would have the appearance of one of the fixt stars.