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# Title: [Astronomiae Physicae & Geometricae Elementa] Astronomiæ Physicæ & Geometricæ Elementa (shelfmark Leibn. Marg. 124)
# Folio 231, page id 1040780814:0249
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A DTHOMETRICA LLEMENTA.
ad utus Asronomicos, unde istronomicum dicitur; hoc ergo adhi-
bendum esset: Atqui ad medium ex dato apparente determinandum
Locus Solis et necesarius; ergo ille praeterpropter crat prius inve
niendus, Tempus apparens, quasi medium fuisset, adhibendo, ut
Temporis Aquatio inveniatur. FIdc vero semel inventa, e appa-
rente Tempore ad Astronomicum reducto, ad Tempus iltud (idem
quod propolitum est momentum, sed numero ad ingrectum in Ta-
Dulas apto expresum) guaratur (per eandem Prop. XVT.) Solis LOcuS,
de Distantia Telluris à Solo, qua patet esse vera d correcta.
Non absimiliter Problematis hujus conrersum construetur, Tem-
Pusque inrenietur, quo Sol d Tellure risus datum Locum tenebit.
S F C TIO
De recauor  Planetarum Primariorum Orbitis determi-
nandis, e horum cum e Sole, tum eellure spectatorum
Pheoria condenai.
PROCOSILIO LIL.
DOsitionem Lineae Loaorum Prois Lhanclara  ipsius Planetae
minare.
in Nodo versantis a Sele Distantium per observationes deter.
commodacto Lelctats Solem; I Orbitam lelluris, cujus lOcusS;
n Lineam Nodorum Plaliela Propolci. Sitque primum Perra in
T, et ex hac obterretur Planeta in Lcliptica, ideoque in Nodo (uo,
puta P: nunquam enim Planeta in Felipriea ridebitur d Fellure in
Feliptica plano ver-
Tante, niti cum infi-
Cliptica plano ctiam
Fuerit. Pot inte
sram rerolutionem
obserretur Planeta
in eodem Nodo, cum
Terra ad+ pervene.
rit. Ducta intelli-
santur rectae ST, PF, item St, PT se mutuo intersecantes in x puncto.
inter oblelrattones intersecto, esTP oblerrata lilongatio llancta
a Sole, e latus sr Distantia Telluris a Sole in obserratione prima:
inVemItus ergo SX; ec ideo xt, Cu cala  3t Vam eulo d
Sole in obserratione secunda: Rursus, in triansulo +XP datur an-
sulus Xe angulo FXS in prori aqualis, a ansul s L
In Figuris binis ad binos casus superioris de inferioris Planeta ac
In triangulo srx dantur ansuli rSF ex Theoria Perra d Tempore
Satio Planeta à Sole secundo obserrata, e latus +x modo inven-
cum; e proinde itremetus Lallo et. DeluC, In triangulo StP
datis laceribus FS, FP, cum angulo compreheno PtS, inrenietur SP
tlatlla