网站首页  英汉词典

请输入您要查询的英文单词:

 

单词 Ordinary chondrite
释义

Ordinary chondrite

中文百科

普通球粒陨石

普通球粒陨石NWA 869

普通球粒陨石(有时被称为O球粒陨石)是一种常见的球粒陨石。它也是迄今找到陨石中为数最多的,占87%。故冠以“普通”二字。

但有趣的是,天文学家怀疑普通球粒陨石并非来自一颗典型的小行星,其“普通”只是这颗小行星的轨道使它的碎片易于到达地球使然。在小行星带内的柯克伍德空隙或长期共振皆存在这种轨道。事实上,在众多已知的小行星当中,只有一颗不起眼的小行星3628被发现具有与普通球粒陨石相似的光谱。

普通球粒陨石中的H球粒陨石(占普通球粒陨石的46%),被认为有可能源自韶神星,但由于韶神星受撞击后相信出现了金属的熔融,故此其光谱与普通球粒陨石并不相似。

英语百科

Ordinary chondrite 普通球粒陨石

Ordinary chondrite NWA 3189 sliced. Field of view ~2.2 cm across. NWA 3189 has been classified as an LL3.2-3.4 ordinary chondrite (“LL” means very low total iron content; “3” refers to well-preserved chondrules - the rock has not been subjected to metamorphism intense enough to disrupt the chondritic texture). This chondrite has a nice, multicolored mix of chondrules of varying size and shape.
Ochansk Meteorite, an ordinary chondrite with a fusion crust, found in 1887 in Russia.

The ordinary chondrites (sometimes called the O chondrites) are a class of stony chondritic meteorites. They are by far the most numerous group and comprise about 87% of all finds. Hence, they have been dubbed "ordinary". The ordinary chondrites are thought to have originated from three parent asteroids, with the fragments making up the H chondrite, L chondrite and LL chondrite groups respectively.

随便看

 

英汉网英语在线翻译词典收录了3779314条英语词汇在线翻译词条,基本涵盖了全部常用英语词汇的中英文双语翻译及用法,是英语学习的有利工具。

 

Copyright © 2004-2024 encnc.com All Rights Reserved
更新时间:2025/6/21 16:25:40