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Autoren:
Verlag:
Theiss, Konrad Weitere Titel dieses Verlages anzeigen
VORWORT | 6 | |
WAS IST EIN METEORIT? | 7 | |
WO FINDET MAN METEORITE? | 15 | |
EINSCHLAGKRATER UND S T O S S W E L L E N E F F E KT E | 25 | |
GEFAHREN AUS DEM ALL | 35 | |
AUS WAS BESTEHEN METEORITE? | 41 | |
WO KOMMEN METEORITE HER? | 67 | |
ENTSTEHUNG UND ENTWICKLUNG METEORITISCHER MATERIE | 85 | |
WICHTIGE ERGEBNISSE DER M E T E O R I T E N F O R S C H U N G | 99 | |
ANHANG | 109 | |
Fälle und Funde IIO | ||
Tabelle Häufigkeiten | III | |
Wo kann man Meteorite besichtigen? | 112 | |
Literatur | 113 | |
Das Sammeln von Meteoriten als Hobby | ||
Glossar und Register | 116 | |
Zu den Autoren | 120 | |
Ablation: Oberflächlicher Materialverlust, z.B. beim Flug
durch die Atmosphäre. 23
Acapulcoite: Primitiver Achondrit mit chondritischer chemi- scher Zusammensetzung. Benannt nach dem Fall des Meteoriten Acapulco 1976 in Mexiko. 45, 57
Achondrite: Gruppe der Steinmeteorite ohne Chondren;
differenzierte Meteorite. 42, 45, 54, 56, 1 1 1
Albedo: Reflexionsvermögen eines planetaren Körpers; das
Verhältnis von reflektiertem zu einfallendem Licht. 76, 83
Akkretion: Prozess der Formation planetarer Körper aus
kleineren Objekten. 55, 56
Aphel: Der Punkt in der Bahnellipse eines Planeten, Asteroiden oder Meteoroiden, der am weitesten von der Sonne entfernt ist. 39
Asteroiden: Kleinplaneten, Planetoiden. 68-78
Asteroidengürtel: Hauptaufenthaltsort von Asteroiden
zwischen Mars und Jupiter. 69f.
Astronomische Einheit (AU): Mittlere Entfernung von Erde
und Sonne; rund 150 Millionen km. 68
Aubrite: Gruppe von achondritischen Meteoriten, auch
Enstatit-Achondrite genannt. Benannt nach einem Fall 1836
in Aubres, Frankreich. 45, 56
Ausgestorbene Radionuklide: Radioaktive Kerne mit kurzer Halbwertszeit, die bei Bildung des Sonnensystems vorhanden waren, aber heute nicht mehr natürlich vorhanden sind. 56, 91
Ataxite: Eisenmeteoritenklasse ohne Widmanstättensche
Figuren. Metall enthält mehr als 16 % Nickel. 65
Basalt: Vulkanisches Gestein. Je nach Basalttyp zusammen- gesetzt aus variierenden Anteilen von Olivin, Pyroxen, Pla- gioklas (Ca-reicher Feldspat) und Gesteinsglas. 55f., 58, 61
Bestrahlungsalter: Zeitabschnitt, in dem Gesteine (z.B:
Meteorite, Mondgesteine) der kosmischen Strahlung ausge- setzt waren. 94, 96
Blaueis: Klares Gletschereis, das keine Luftblasen enthält. Da
der rote Anteil im Spektrum des Sonnenlichts bevorzugt
absorbiert wird, erscheint es bläulich. 22f.
Brachinite: Seltene Achondritengruppe, bestehend hauptsäch-
lich aus Olivin. Benannt nach dem Fund 1974 in Brachina,
Australien. 45, 56f.
Brekzie: Gestein aus eckigen Fragmenten früherer Gesteins-
generationen, die durch eine feinkörnige Grundmasse verkit-
tet sind. 53f.
CAIs: Calcium-Aluminium-reiche Einschlüsse in Meteoriten
(Ca-Al-rich Inclusions); frühes Kondensationsprodukt ent-
standen bei hoher Temperatur. 48, 90f.
Chassignite: Gruppe der Marsmeteorite. Benannt nach dem Fall 1815 von Chassigny, Frankreich. 45, 59, 61, 95, 96
Coesit: Hochdruckmodifikation von Quarz, Indikator für
Meteoriteneinschläge. 30
Chondren: Schmelzkügelchen, mm-groß, charakteristisch für
Chondrite. 46ff.
Chondrite: Gruppe der Steinmeteorite mit Chondren;
undifferenzierte Meteorite. 46ff, 1 1 1
Differentiation: Vorgang der Separation von Schmelzen und festen Bestandteilen durch die Schwerkraft innerhalb eines planetaren Körpers; planetare oder magmatische Differentiation. 45
Diogenite: Pyroxenreiche Gruppe der Achondrite. Name nach
Diogenes von Appolonia. 45, 56, 77, 1 1 1
Dunkelphase: Letzte Periode eines Meteoritenfalls, ohne
Lichtemission. 21
Eisenmeteorite: Gruppe von Meteoriten, die überwiegend aus
Metall bestehen. 10, 16, 20, 42, 45, 64ff., 1 1 1
Einschlagkrater: Auch Impaktkrater genannt; durch den
Einschlag eines festen Körpers auf der Oberfläche eines
anderen Festkörpers entstandener Krater. 19, 26, 29ff.
Ekliptik: Fläche, in der die Bahn der Erde um die Sonne liegt.
80
Enstatit-Chondrite: Klasse von reduzierten, viel Metall
enthaltende Steinmeteoriten. 44, 56, 78, 1 1 1
Eukrite: Gruppe basaltischer bis gabbroider Achondrite (nach griech. eucritos = deutlich, da wegen der Grobkörnigkeit der Mineralbestand leicht bestimmbar). 45, 56, 76, 1 1 1
Exzentrizität: Maß für die Abweichung von einer kreisförmi- gen Bahn (für Kreis: 0; Ellipse <1). 39
Fall: Bezeichnung für einen beobachteten Meteoritenfall, von
dem Materie geborgen wurde. 8, 16, 1 10f.
Fallellipse: Streufeld eines Meteoritenschauers oft in Form einer Ellipse. 19, 20