火星陨石

南极GRV99027陨石：火星陨石中的一个新成员

Antarctic GRV 99027 meteorite : a new member in Martian meteorite

大约21亿年前，这块迄今地球发现的第二块最古老的火星陨石形成于一次火山喷发过程中。

At 2.1 billion years old , it 's the second-oldest known Martian meteorite that formed from a volcanic eruption .

其他太空飞船的发现和火星陨石也证明了火星表面是有盐分存在的。

Other spacecraft and Martian meteorites have shown that the Martian surface is salty .

南极陨石研究的启示Ⅵ：火星陨石的研究及宇宙化学意义

Inspiration from study of Antarctic meteorites ⅵ . investigations of Martian meteorites and implications for cosmochemistry

14.火星陨石可以卖到500美元/克，其他陨石则只能卖2美元/克。

14.Martian meteorites can sell for $ 500 a gram . Space rocks fetch just $ 2 a gram .

火星陨石的发现使人类第一次获得了除地球之外，太阳系另一类地行星的岩石样品。

Samples from another Earth like planet of the solar system is now available due to discovery of Martian meteorites .

目前已收集并确证的火星陨石共10个，包括了4种岩石类型，其中有4个火星陨石是在南极地区发现和回收的。

Up to 10 Martian meteorites covering 4 petrographic types have been found so far , including 4 meteorites collected in the Antarctic area .

从同一地点数次拍摄的照片向调查员显示出在过去的7年中似乎有液态水流过火星陨石坑的山谷。

Images taken of the same areas over time showed investigators that liquid water likely flowed through gullies in Martian craters during the past seven years .

新的和独特陨石类型的研究以及月球和火星陨石的研究有利于探索和了解早期太阳星云的连续化学分馏作用及月壳和火星表面的平均化学组成及其横向变化。

The study on new and unique meteorite types are useful for understanding continuous chemical fractionation of early solar nebula and horizonal variation of lunar crust and Martian surface .

随着咸水渗入火星陨石坑和山丘的斜坡，它留下了不到5米宽的狭窄条纹，这些条纹在温暖季节显现并延长，而在火星冬季时逐渐消失。

As it seeps down the slopes of Martian craters and mountains , it leaves narrow streaks less than five metres wide , which appear and lengthen during the warm season and fade during the Martian winter .

认为，火星陨石坑的分布具有碎形特征，并符合分形分布，分维数为1.7.和地球上其它岩石破碎相比，分维数较低。

The result shows that the relationship between the dimension and number of pits is fragmentation and fractal , its fractal dimension is 1.7 , that is relatively small comparing to the rock fragmentation on the earth .

火星表面陨石坑的碎形特征

Fragmentation of meteorite pits on Mars ' surface

这周，我们要讲一个关于石头的故事。一百年前一颗来自火星的陨石落在了埃及境内。

This week , the story of a rock from Mars which fell in Egypt a century ago .

但来自火星的陨石带给了我们另一个信息：有时候行星受到的撞击如此猛烈，能让岩石完全脱离其表面。

But Martian meteorites do have one other tale to tell-that planets are sometimes hit so hard that rocks can escape from them completely .

本文主要依据现有的资料综述陨石分类，以及来自小行星带、月球和火星等不同类型陨石的宇宙射线暴露（CRE）年龄及其宇宙化学意义。

In this review on the bases of knowing data we summarized the classification of meteorite groups , cosmic-ray ages of the different meteorite types from asteroid belt , Moon and Mars .

但是火星上并没有发现生物。1996年美国国家航空及太空总署声称在一块火星陨石中发现了细菌化石，但大家大多并不认同这一发现。

But no life has been found on Mars , and the one claim of fossil bacteria in a Martian meteorite , made by NASA scientists in1996 , has been almost universally rejected .

“毅力”号火星车于本周四（2月18日）下午3点55分左右在火星的耶泽罗陨石坑成功着陆后，美国宇航局发布了第一批由其传回的照片。“毅力”号是美国宇航局的第五辆火星巡游车。

NASA has unveiled the first pictures from its fifth Mars rover , Perseverance , after a successful landing on the red planet 's Jezero crater at approximately 3:55 pm Thursday .