moon--Discoveries yet to be made


CHAPTER IX

_HOW TO FIND THE PLANETS_ 256

It is easy to make acquaintance with the planets and to
follow them among the stars--The first step a knowledge of
the constellations--How this is to be acquired--How to use
the Nautical Almanac in connection with the charts in this
book--The visibility of Mercury and Venus--The oppositions
of Mars, Jupiter, and Saturn


INDEX 277




LIST OF ILLUSTRATIONS


PAGE
Chart of Mars _Frontispiece_

Diagram showing causes of day and night on portions of Mercury 35

Regions of day and night on Mercury 38