Subtitles section Play video Print subtitles Let's go a handle of it. Three stars in a row. Give us some extra e. Uh, sure, it is not always good when space rocks fall to Earth. But fortunately, you know, this was very controlled. In fact, it was an amazing technological achievement. And this sample coming back in a little metal capsule of sort of human made flying saucer, if you will, coming back from this 4.6 billion years old Asteroid re Hugo, which is just about 900 m in diameter but absolutely pristine rock. It is still in a box. But, you know, just being exposed to the air and the radiation on Earth from the sun means that the sample may change. So you just have to make sure that it remains really airtight and capture those gasses that were trapped inside the rock samples because they're the really exciting key toe. What things were like 4.6 billion years or so ago.
B1 sample asteroid earth diameter pristine hugo Japan asteroid sample lands safely on Earth - BBC News 13 0 林宜悉 posted on 2020/12/07 More Share Save Report Video vocabulary