PLATE IX.
Is an exact Scheme of the principal known Comets, in just Proportion, to the Globe of the Earth represented at A, with the Nucleus, and Part of the Tail of the Comet of 1680, B, as it was observed in its Assent from the Sun, viz. a a the Comet's natural Atmosphere, z z z, the Denser Matter winding itself into the Axis of the Train x x, the inflam'd Atmosphere and Tail dilated near the Sun. C, represents the Ball of the Comet of 1682, D, that of 1665, E, that of 1742, and F, the Head of the Comet of 1744.
And again, that you may have some Notion of the apparent Magnitudes of all these Planets and Comets, &c. as they appear at the Earth,
Plate VI.
Plate VII.
Plate VIII.
Plate IX.
Plate X.
Plate XI.
Click on image to view larger sized.