Soubor:Widmanstatten IronMet.JPG
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Widmanstatten_IronMet.JPG (rozměr: 399 × 269 pixelů, velikost souboru: 45 kB, MIME typ: image/jpeg)
Fotografie + Description: Gibeon meteorite, etched slice. University of New Mexico, Institute of Meteoritics. Widmanstätten-Figuren (NASA). Iron meteorites probably formed in the cores of asteroids, and were released when the asteroids were shattered by impacts. Inside, many iron meteorites are made of criss-crossing intergrown crystals of two iron-nickel minerals. The two types of crystals in this sample are several centimeters wide. The sizes and shapes of the crystals suggest that they cooled down so slowly, a few degrees each million years, that they must have been inside large asteroids.
+ pochází z Wikimedia Commons, kde má status – This file is in the public domain in the United States because it was solely created by NASA.
NASA copyright policy states that "NASA material is not protected by copyright unless noted".
(Use of NASA logos, insignia and emblems is restricted per U.S. law 14 CFR 1221)
NASA copyright policy states that "NASA material is not protected by copyright unless noted".
(Use of NASA logos, insignia and emblems is restricted per U.S. law 14 CFR 1221)
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| Datum a čas | Náhled | Rozměry | Uživatel | Komentář | |
|---|---|---|---|---|---|
| současná | 9. 4. 2014, 13:16 | | 399×269 (45 kB) | Sysop (diskuse | příspěvky) | (MW1.15-Fotografie) |
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