The story of the sun, moon, and starsGiberne, Agnes
Science
The story of the sun, moon, and stars
Giberne, Agnes
Astronomy -- Juvenile literature
The comet belonging to the November system is a small one--quite an
insignificant little comet--only visible through a telescope. We
do not, of course, know positively that larger comets and greater
meteorite systems generally go together, but, to say the least, it
seems likely. And if the greatness of a ring can at all be judged of by
the size of its comet, then the November system must be a third-rate
specimen of its kind. It is of particular importance to us, merely
because it happens to be the one into which our earth plunges most
deeply, and which we therefore see and know the best. The August ring
is, on the contrary, connected with a magnificent comet, and may be
a far grander system. But our pathway does not lead us into the midst
of the August meteors as into those of November. We pass, seemingly,
through its outskirts.
The meteorites of the November system are very small. They are believed
to weigh commonly only a few grains each. If they were larger and
heavier, some of them would fall to earth as aerolites, not more than
half-burnt in their rush through the atmosphere. But this they are
never found to do.
There are known meteorite systems, which our earth merely touches
or grazes in passing, from which drop aerolites of a very different
description--large, heavy, solid masses. It is well for us that we do
not plunge into the midst of any such ring, or we might find our air,
after all, a poor protection.
The last grand display of the November system of meteorites took place
in the years 1866 to 1869, being continued more or less during three or
four Novembers following. The next grand display will occur in the year
1899.
For this system--Leonides, as it is called, because the falling-stars
in this display seem all to shoot towards us from a spot in the
constellation Leo--seems to have a “time” or “year” of thirty-three and
a quarter earthly years. The shape of its orbit is a very long ellipse,
near one end of which is the sun, while the other end is believed to
reach farther away than the orbit of Uranus.
A great deal of curiosity has been felt about the actual length and
breadth and depth of the stream of meteorites through which our
solid earth has so often plowed her way. During many hours at a
time, lookers-on have watched the magnificent display of heavenly
fireworks,--not a mere shooting-star here and there, as on common
nights, but radiant meteors, flashing and dying by thousands through
the sky. In 1866 no less than eight thousand meteors, in two hours and
a quarter, were counted from the Greenwich Observatory in England. A
natural wonder sprang up in many minds as to the extent of the ring
from which they fell.
Public-domain text, read in full here on John Shaqi.
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