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# Title: Nicolai Mercatoris Holsati, è Soc. Reg. Institutionum Astronomicarum Libri Duo, De Motu Astrorum Communi & Proprio, Secundum Hypotheses Veterum & Recentiorum præcipuas; Deqve Hypotheseon ex observatis constructione (shelfmark Leibn. Marg. 63)
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dect. 3
ASTRONOMIA
PROBLEMA XX.
Comparare Planetas ratione molis, sive maenitudinis.
Ecir id ex voco Christianus FTurenius in Syltemare luo Sa-
L curnio, cujus proinde verba ipsiltima Lectoriirado, à Pa8
J.ad Pa8. 82. Tic habentia: Docuie nos novo suo ac diviricus
el
inverco lyAemace Coperniens, quamnam inter se proporrio
lem Cervene lingulorum à Sole Planetarum dictantice; ap.
bdrences vero corundem diamerri quanto alix aliis majores
linr, celelcopii opc innorescit. Collatis ergo invicem rario-
libus verisque, cum distancix cum magnicudinis apparencis;
era inde Planerarum ad se mutuo, nec non ad Solem mag-
nicudo cognoscieur. Ecad Saturnum quod atriner; primuni
annuli ejus diamerer, quum in minima a nobis dictancia com-
Prehendatur angulo sexaginta _ octo scrupulorum secundo-
um; calem enim ad summum reperimus; cumque minima
xx snturni distancia ad medioerem Solis diltanciam (ic Fere
Octupla; sequicur, si ram propinquus nobis heret SatmrnuE
quam Sol in distancia mediceri, apparicuram cune annule
diamerrum octuplam ejus quae nunc apparet, hoc elt, min. 9.
CC. 4. Solis aurem diamerer in media distancia est mIn. 30.
lec. 30. Ergo revera ea erit proporrio diamerri annule
dacurnii ad diametrum Solis quxe mir. 9. sec. 4. ad mIn. 30.
ec. 30. hoc est, fere qua PF ad 37. Diameter vero Satmens
plius, quam superius diximus ad annuli diametrum se habere
lc 42d9, hoc eAt fere ur 5 ad Er, ad diamerrum Solis crit
Pdulo minor quamm 5 ad 37.
Duanca vero sic Sacurni diameter ad Telluris diatmerrum
Collaca haud aegne cerro detiniri porest. AAtronomi ita hoc
inveltisane, uc primo intervallum incer cerram ac solem ad
Cerrum cerrestrium diametrorum numerum revocene, inde
Jus sicata maonieudinumi rarionem eliciane. AFin illo Solis
terraeque