Two or three of the Asteroids were in view. Pallas especially
presented a very interesting spectacle. Not that the difference of
distance would have rendered the definition much more perfect than
from a Terrestrial standpoint, but that the marvellous perfection of
Martial instruments, and in some measure also the rarity of the
atmosphere at such a height, rendered possible the use of far higher
magnifying powers than our astronomers can employ. I am inclined to
agree, from what I saw on this occasion, with those who imagine the
Asteroids to be--if not fragments of a broken planet which once
existed as a whole--yet in another sense fragmentary spheres, less
perfect and with surfaces of much greater proportionate irregularity
than those of the larger planets. Next was presented to our view on a
somewhat smaller scale, because the area of the chamber employed would
not otherwise have given room for the system, the enormous disc and
the four satellites of Jupiter. The difference between 400 and 360
millions of miles' distance is, of course, wholly unimportant; but the
definition and enlargement were such that the image was perfect, and
the details minute and distinct, beyond anything that Earthly
observation had led me to conceive as possible.
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