时差N小时 如何制作陨石坑?(上)（在线收听）

What makes science really fun is when you get to do things yourself, so today we’re going to be making moon craters.

科学真正有趣的时刻是当你亲身实践的时候，今天咱们来一起制作月球陨石坑吧！

They’re the roundish blast-marks left on the moon’s surface by ancient meteorites.

陨石坑是古代陨石撞击月球表面后留下圆形痕迹。

The moon’s surface is covered with literally billions of impact craters, and some of them are bigger than a fair-sized city on earth.

月球表面有数十亿的陨石坑，有的陨石坑甚至比地球上某个大城市还要大。

You can see the bigger ones just with the naked eye, and with a pair of binoculars you can make out many more.

通过肉眼，你只能看到月球表面较大的陨石坑，如果使用望远镜的话就能看到更多陨石坑。

So now let’s make some of our own. Take a wide, flat pan, such as the kind you’d bake cookies in.

现在，咱们来自己制作陨石坑吧。找一个宽的平底锅，类似于平时烘焙饼干的那种。

Take it outside, because this gets kind of messy! Poor flour or baking soda or sand across the bottom so it makes a thick, flat surface.

最好到户外做，因为实验现场会一团糟。将面粉、小苏打或沙子倒进锅底，形成一层厚实、平坦的表面。

That’s your undisturbed moon.

这就像未受到过撞击的月球表面。