of our
adversaries, and they are the very words of noble _Tycho_,[1]

_Si luna genuino gauderet lumine, utique cum in umbra terrae esset,
illud non amitteret, sed eo evidentius exereret, omne enim lumen in
tenebris, plus splendet cum alio majore fulgore non praepeditur._

If the Moone had any light of her owne, then would she not lose it in
the earths shadow, but rather shine more clearely, since every light
appeares greater in the darke, when it is not hindered by a more
perspicuous brightnesse.

[Sidenote 1: _De nova stella lib. 1. c. 10._]

But now the event falls out cleane contrary, (as observation doth
manifest, and our opposites themselves doe grant)[1] the Moone appearing
with a more reddish and cleare light when she is eclipsed being in her
Apoge or farthest distance, and a more blackish yron colour when she is
in her Perige or neerest to us, therefore shee hath not any light of her
owne. Nor may we thinke that the earths shadow can cloud the proper
light of the Moone from appearing, or take away any thing from her
inherent brightnesse, for this were to thinke a shadow to be a body, an
opinion altogether mis-becomming a Philosopher, as _Tycho_ grants in the
fore-cited place,

_Nec umbra terrae corporeum quid est, aut densa aliqua substantia,
aut lunae lumen obtenebrare possit, atque id visui nostro praeripere,
sed est quaedam privatio luminis solaris, ob interpositum opacum
corpus terrae._

Nor is the earths shadow any corporall thing, or thicke substance, that
it can cloud the Moones brightnesse, or take it away from our sight, but
it is a meere privation of the Suns light, by reason of the
interposition of the earths opacous body.

[Sidenote 1: Reinhold _comment. in Purb. Theor. pag. 164._]

2. If shee had any light of her owne then that would in it selfe be,
either such a ruddy brightnesse as appeares in the eclipses, or else
such a leaden duskish light as wee see in the darker parts of her body,
when shee is a little past the conjunction. (That it must be one of
these may follow from the opposite arguments) but it is neither of
these, therefore she hath none of her owne.

1. 'Tis not such a ruddy light as appeares in eclipses, for then why can
wee not see the like rednesse, when wee may discerne the obscurer parts
of the Moone?

You will say, perhaps, that then the neerenesse of that greater light,
takes away that appearance.

I reply, this cannot be, for then why does Mars shine