The Age of Reason by Thomas Paine

That part of the universe that is called the solar system (meaning the system of worlds to which our earth belongs, and of which Sol, or in English language, the Sun, is the center) consists, besides the Sun, of six distinct orbs, or planets, or worlds, besides the secondary bodies, called the satellites, or moons, of which our earth has one that attends her in her annual revolution round the Sun, in like manner as the other satellites or moons, attend the planets or worlds to which they severally belong, as may be seen by the assistance of the telescope.

The Sun is the center round which those six worlds or planets revolve at different distances therefrom, and in circles concentric to each other. Each world keeps constantly in nearly the same tract round the Sun, and continues at the same time turning round itself, in nearly an upright position, as a top turns round itself when it is spinning on the ground, and leans a little sideways.