Saturday, 27 October 2018

Do the stars really fall down?

  The things that fall, and are called shooting stars, are really not stars at all. If a real star fell onto the Earth-or, rather, if the Earth fell into a star-we should all be burnt up by the heat, long before the Earth and the star  meet each other. The things that fall are really quite small stones, or pebbles, or balls of iron and other elements. 

They sometimes fall all the way to the Earth, and can be picked up afterwards. By far the greatest number of them, however, never reach the surface of the Earth as stones, or meteorites, atall, for they are burnt up, or broken up, into dust by the Earth's thick atmosphere. A very great amount of the dust in the air, especially in the higher levels of the atmosphere, is made of this meteoric dust. We see only a few of the falling stars that are caught by the Earth's atmosphere. Though they are falling all the time, we never see those that fall in the daytime. They become bright and hot as they pass through the air, but not bright enough for our eyes to notice when the Sun is shining upon our part of the Earth. Quite a lot of the present matter of the Earth has been derived from meteors, or falling stars, in this way. The meteoric dust can sometimes be found lying on the snow of the high peaks of mountains.i

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