Space Nomads: Meteorites in Sky, Field, and LaboratoryLaPaz, Lincoln
Science
Space Nomads: Meteorites in Sky, Field, and Laboratory
LaPaz, Lincoln
Meteorites
Howard’s views were soon put to the test. Shortly after the publication
of his important paper, a shower of stony meteorites fell near L’Aigle,
France, on April 26, 1803. This event was carefully investigated by
French scientists, and they reluctantly admitted that about 3,000 stones
actually had fallen within an oval-shaped area about 6 miles long by 2
miles wide. This shower of meteorites had been accompanied by the same
light and sound effects mentioned in many of the old meteorite-fall
reports collected by Chladni, effects now recognized as characteristic
of the infall of meteorites upon the earth. The evidence was
overwhelming—stones really did fall from the sky. In the camp of the
enemy, so to speak, the reality of meteorite falls was established once
and for all!
12. THE MODERN VIEW
After the L’Aigle shower of 1803, a whole new era opened in the study of
meteorites. No longer did scientists hold these objects up to ridicule
and scorn. Instead, they came to regard meteorites as well worth
collection and careful study.
The Vienna Museum, the British Museum, the Paris Museum, the Academy of
Science of St. Petersburg (now Leningrad), and the U.S. National Museum
began to build up splendid meteorite collections. Scientists in Germany,
England, France, and Russia engaged in the painstaking mineralogical
study and classification of individual meteorite specimens.
The modern science of meteoritics is rooted deep in the nineteenth
century. Many special fields of investigation had their beginnings then.
Scientists became interested in the chemistry, the mineralogy, and the
metallurgy of meteorites; in the orbits of meteorites and the
trajectories they follow through the earth’s atmosphere down to impact
with the ground; and in the distribution of meteorite falls in space and
time.
From this period we can date such milestones of progress in meteoritics
as:
The discovery of the beautiful and significant Widmanstätten patterns
characteristic of the majority of the irons, and the less spectacular
but equally important lines named for J. G. Neumann, the German
meteoriticist who discovered them, in 1848, in the Braunau meteorite.
The realization that there were many different kinds of meteorites and
that these diverse objects were very important to an understanding of
the internal structure and origin of the earth, and perhaps of the
Solar System and the wider cosmos as well.
Tentative explanations of the violent and terrifying light and sound
effects connected with meteorite falls.
Tentative explanations of such oval-shaped areas as shown above.
[Illustration: Typical distribution of meteorite fragments according
to size, within oval-shaped area of fall. The larger masses of the
shower carry farther on, in the direction of the motion of the
meteorite. As early as 1814, investigators had noted this
peculiarity of meteorite-shower distributions. See pp. 32, 89, 94.]
Public-domain text, read in full here on John Shaqi.
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