On the Revolutions of the Heavenly Spheres

11. On three other acronychal original: acronychijs; referring to a planet rising in the east just as the sun sets in the west, placing it in opposition sightings of Jupiter recently observed.
12. Confirmation of the uniform motion of Jupiter.
13. Assigning the positions of Jupiter's motion.
14. On perceiving the parallaxes original: commutationibus; the apparent shift in a planet's position caused by the Earth's own motion of Jupiter, and its altitude according to the ratio of the Earth's annual revolution.
15. On the star of Mars.
16. On three other nighttime "glowings" original: fulsionibus; likely referring to bright oppositions regarding the star of Mars, observed recently.
17. Confirmation of the motion of Mars.
18. The fixing of the positions of Mars.
19. How large the orbit of Mars is in parts where the Earth's annual orbit is one.
20. On the star of Venus.
21. What the ratio of the diameters of the Earth's and Venus's orbits is.
22. On the dual motion of Venus.
23. On examining the motion of Venus.
24. On the positions of Venus's anomaly the angular distance of a planet from its furthest point from the center of its orbit.
25. On Mercury.
26. On the position of Mercury's highest and lowest apsides original: absidum; the points in an orbit where the planet is closest to or furthest from the sun.
27. How great the eccentricity original: eccẽtrotes; the degree to which an orbit deviates from a perfect circle of Mercury is, and the symmetry of its orbits.
28. Why the elongations original: digreßiones; the angular distance of a planet from the sun of Mercury appear larger near the side of a hexagon an angle of 60 degrees than those occurring at the perigee the point in an orbit closest to the Earth.
29. Examination of the mean motion of Mercury.
30. On more recent observed motions of Mercury.
31. On fixing the positions of Mercury.
32. On another certain reason for approach and withdrawal.
33. On the tables of prosthaphæreses corrections added or subtracted to the mean motion to find the true position of a planet of the five wandering stars the five known planets: Saturn, Jupiter, Mars, Venus, and Mercury.
34. How the positions of these five stars are calculated in longitude.
35. On the stations and retrogradations original: repedationibus; the appearance of a planet moving backward in the sky of the five wandering stars.
36. How the times, positions, and circumferences of regressions are distinguished.

BOOK SIX

1. General exposition of the deviation in latitude the distance of a planet north or south of the ecliptic, or the Earth's orbital plane of the five wandering stars.
2. Hypotheses of the circles by which these stars are carried in latitude.
3. How great the inclination of the orbits of Saturn, Jupiter, and Mars is.
4. Explaining any other latitudes, and latitudes in general, for these three stars.
5. On the latitudes of Venus and Mercury.
6. On the second passage in latitude of Venus and Mercury according to the obliquity of their orbits at apogee the point furthest from Earth and perigee.
7. What the angles of obliquity the tilt or inclination of the orbital planes are for both stars, Venus and Mercury.
8. On the third type of latitude for Venus and Mercury, which they call Deviation.
9. On the calculation of the latitudes of the five wandering stars.