资讯

In the article, “A Low-Temperature Transfer of ALH84001 from Mars to Earth,” the scientists do not claim that microbial life actually traveled from Mars to Earth aboard the meteorite, but they ...
The oldest known Martian meteorites, which date to roughly 4.4 billion years ago, therefore present an “amazing chance to study the magnetic field,” says Vervelidou, of MIT and the Institute ...
MOST of the secondary or chondritic meteorites are composed of irregular grains of silicate, sulphide, phosphide, oxide and metal phases. They are generally thought to be fragments of secondary ...
Unusual shape: iron-nickel meteorites are rarely rounded. Instead, they have an irregular shape with unusual pits like finger prints in their surface called “regmaglypts.” Fusion crust: stony ...
Scientists say some iron meteorites bear the remnants of an internally-generated magnetic field — which shouldn’t be possible. Although iron meteorites are thought to represent the metallic cores of ...
Even if a meteorite does contain iron, it isn't expected to have a circulating dynamo, like the one in Earth's inner core, which scientists think is necessary to generate a magnetic field.
Meteorite hunting is a big business, ... This led the team to develop a mathematical model based that could help determine whether or not a small hand magnet had been used to re-magnetize a meteorite.
Meteorites record the tumultuous history of the solar system’s formative years, but the origins of these ancient space rocks are often unknown (SN: 4/18/18).). “It’s absolutely like a pot of ...