50 Mr, Micuets on the Means of ai ifeavering the. 
his. prefent diftance would ftill appear, I apprehend, as bright as. 
S11Us, as I have obferved above ; whereas it is hardly to be ex- 
pected, with any telefcopes whatfoever, that we fhould ever be. 
able to diftinguifh a well defined dife of any body of the fame 
fize with the fun at much more than ten thoufand times his, 
diftance. . : bik sah se ‘ oa f, 
28. Hence the greateft diftauce at which it would be poffible. 
to diftinguith any, fenfible apparent diameter of a body as denfe 
as the fun cannot well greatly exceed five hundred times tem, 
thoufand, that is, five million times the diftance of the fun 3, 
for if the diameter of fuch a, body was not lefs than five hun-. 
dred times that of the fun, its ight, as has been fhewn above,, 
i art. 16; could never arrive at us,..; 7 
29. If there fhould really exitt, in aa aaie any, bodies; . whofe. 
denfity is not lefs than that.of the fan, and whofe diameters are. 
more than 500 times the diameter of the fun, fince their 
hight could not arrive at us; or if there fhould exit any other 
bodies of a fomewhat {maller fize, which are not naturally lu- 
minous; of the exiftence of bodies under either of thefe cir- 
cumftances, we could have no information from fight ; yet, if, 
any other luminous bodies fhould happen to revolve about thems 
we might ftill perhaps from the motions of thefe revolving 
bodies inter the exiftence of the central ones with fome degree 
of probability, as this might afford a clue tofome of the ap- 
parent irregularities of the revolving bodies, which would not 
be eafily explicable on any other hypothefiss; but as the con-. 
fequences. of fuch a fuppofition are very obvious, and, the 
confideration of them fomewhat befide my, prefent purpofe, I 
fhall not profecute them any farther. ) 
a : 30. The 
