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Glossary term: 鐵隕石

Description: 鐵隕石是含有大量鐵和鎳的隕石。它們被認為是小行星核心的一部分,密度很高,重量也很大。儘管鐵隕石只占撞擊地球表面的隕石總數的 5%,但在地球上發現的隕石中卻幾乎有 60% 是鐵隕石。其中一個原因是它們更堅固,不像石隕石那樣容易風化。

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Term and definition status: The original definition of this term in English have been approved by a research astronomer and a teacher
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This is an automated transliteration of the simplified Chinese translation of this term

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A shiny silver cross-section of a meteorite with  two sets of many parallel lines crossing each other

Iron Meteorite

Caption: This iron meteorite was originally found in Harriman, Tennessee, USA and is now held in the collection of the Smithsonian Natural History Museum, Washington DC, USA. The total mass of the meteorite was about 30kg. Here we see the interior after the meteorite was cut into pieces. Iron meteorites are largely composed of an iron-nickel. They also often have a crystalline structure which manifests here as a series of crossing shiny straight lines known as a Widmanstätten pattern. This is thought to have formed as the meteoroid (the object that would eventually fall through the Earth's atmosphere as a meteor and land on the ground as a meteorite) cooled very slowly in the vacuum of space in the early solar system. This led to the growth of this crystalline structure.
Credit: Chuck Sutherland credit link

License: PD Public Domain icons