اذا لم تجد ما تبحث عنه يمكنك استخدام كلمات أكثر دقة.
p. cm
Contents.--I. Uranus and Eros.--II. The discovery of Neptune.--III. Bradley's discoveries of the aberration of light and of the nutation of the earth's axis.--IV. Accidental discoveries.--V. Schwabe and the sun-spot period.--VI. The variation of latitude