y-streaks are only suggested in the picture, because, if
shown complete, they would have the same effect as upon the moon, viz.
they would entirely obliterate all the formations over which they
passed.

The Key Map indicates the principal lunar formations, and includes the
names of those mentioned in the book.

The last two plates in the book are from drawings made at the telescope
(a 12-inch Calver reflector) by the Rev. T. E. R. Phillips. The
opposition of 1909 was not favourable for the observation of Martian
details from England; for although the planet was near to us, it was too
low down in the sky; and many of the nights were either cloudy or
misty.

THE SUN, MOON, AND PLANETS

Diameter. Period of Rotation. Mean Distance
from the Earth.
---------------------------------------------------------------------------
SUN 865,000 miles 25 to 26 days 92,800,000 miles

MOON 2,160 miles 27-1/3 days 238,000 miles
(It revolves round the
earth in the same time.)
---------------------------------------------------------------------------
PLANETS. Diameter in Number of Period of Period of Mean Distance
Miles.[1] Satellites Rotation. Revolution from the Sun in
Known.[2] Round the Sun. Millions
of Miles.
---------------------------------------------------------------------------
Hrs. Mins. Days.
Mercury 2,992 None [3]? 88 36
Venus 7,660 None ? 225 67
Earth 7,918 One 23 56 365-1/4 92-3/4
Mars 4,220 Two 24 37 687 141-1/2
Asteroids Very tiny planets, hundreds in number; and more are
frequently being discovered.
Jupiter 86,000 Eight 9 55 4,332-1/2 482
Saturn 74,000 Ten 10 14 10,759 886
Uranus 31,700 Four Not known 30,687 1,780
Neptune 34,500 One " " 60,127 2,780
---------------------------------------------------------------------------

TO MARS _via_ THE MOON

(_Narrative written by Wilfrid Poynders, Esquire, late