THEORY OF VENUS

AND MERCURY.

An elaborate astronomical engraving illustrating the orbits of Mercury and Venus according to a geocentric or Tychonic model. The central circular diagram is framed by clouds and cherubs. The outer circle depicts the twelve signs of the zodiac. Inside, nested circles represent the eccentrics and epicycles of the planets. Text in the center and along the orbits explains the measurements in Earth diameters. Two small diagrams appear in the bottom corners, and personified figures representing the astronomical sciences are seated at the bottom.

INTERIOR ECCENTRIC CARRYING THE PROPER APOGEE OR APOGEE OF THE SUN

MEAN MEASUREMENT FROM THE APOGEE OF VENUS TO THE END. DISTANCES ARE MEASURED IN EARTH DIAMETERS. THESE DOUBLED WILL PROVIDE EARTH SEMIDIAMETERS.

EXTERIOR ECCENTRIC CARRYING THE PROPER APOGEE OR APOGEE OF THE SUN

DISTANCES OF THE

APOGEES.

AB Eccentricity of the center of the ECCENTRIC of the SUN 33 units, 52 minutes, 40 seconds of Earth.
BC Semidiameter of the ECCENTRIC of the SUN 371 diameters, 42 minutes, 8 seconds of Earth.
DC Eccentricity of VENUS 11 diameters, 24 seconds of Earth, distant from the APOGEE of the SUN C.
CX Eccentricity of MERCURY distant from the center C to the APOGEE of the SUN and the center of the EPICYCLE of MERCURY 14 diameters, 12 seconds of Earth.
XY Semidiameter of the EPICYCLE of MERCURY 104 diameters, 40 seconds of Earth.
DG Semidiameter of the EPICYCLE of VENUS 411 diameters, 51 seconds of Earth.
AC Maximum distance of the SUN from the Earth 591 diameters, 10 minutes, 8 seconds of Earth.
AX Maximum distance of MERCURY from the Earth 513 diameters, 17 minutes, 20 seconds of Earth.
AG Maximum distance of VENUS from the Earth 1014 diameters, 25 minutes, 59 seconds of Earth.

DISTANCES OF THE

PERIGEES.

AM Minimum distance of VENUS, and the same of the perigee from the Earth 138 diameters, 25 minutes, 56 seconds of Earth.
AL Minimum distance of MERCURY of the perigee from the Earth 341 diameters, 58 minutes, 5 seconds of Earth.
LK Semidiameter of the EPICYCLE of MERCURY 214 diameters, 47 minutes, 8 seconds of Earth.
AK Distance of the center of the EPICYCLE of MERCURY 498 diameters, 39 minutes, 1 second of Earth.
MI Semidiameter of the EPICYCLE of VENUS 411 diameters, 8 minutes, 11 seconds of Earth.
AI Distance of the center of the EPICYCLE of VENUS from the Earth 599 diameters, 11 minutes, 7 seconds of Earth.
KK Eccentricity of MERCURY from the Apogee of the SUN 33 diameters, 16 seconds of Earth.
II Eccentricity of VENUS from the Apogee of the SUN 11 diameters, 24 seconds of Earth.
AH Minimum distance of the SUN and the same of the perigee from the Earth 352 diameters, 12 minutes, 5 seconds or 12 minutes, 8 seconds of Earth.