THE

ORBS OF HEAVEN,

OR,

THE PLANETARY AND STELLAR WORLDS.

A POPULAR EXPOSITION OF

THE GREAT DISCOVERIES AND THEORIES OF
MODERN ASTRONOMY

BY O. M. MITCHELL, A.M.

Director of the Cincinnati Observatory

BIBLIO

LONDON:

OFFICE. OF THE NATIONAL ILLUSTRATED LIBRARY,

198, STRAND.
1851.

184.be.10.