"Again one thing, and then I'm done. In the higher regions of the atmosphere, where the shooting stars light up a cold reigns extremely intense and is still the most intense cold that prevails in the planetary space, where the temperature is estimated to more modest would be about 150 degrees below zero. Others claim that it is indeed even of 273 °, which is the largest cold as possible and corresponds to the total absence of heat. How, then, you say, as happens in a place so cold that the matter of shooting stars can heat up enough to melt in the vapors? And where should it take the heat?
To understand this, just consider that these celestial bullets entering the atmosphere with an enormous speed, between 16 000 and 72 000 meters per second: where the balls rifle or gun is not used to spend a lot of 500 meters per second. ... The air has no time to place the bullet, and slip sideways, it compresses strongly in front of his front surface. Or the air warms up with violence, and with a plausible calculation is that the heat developed by compression during the advance of the meteor may go up to 10000 degrees and more, which is enough to melt any body more refractory, and also reduce vapors. "
by: GV Schiaparelli The rain of stars, the conference in favor of the Pension Benefits for the young workers Sunday, February 14, 1886
Credits: Library of the Observatory. Image Credits
& Copyright: Tony Rowell / Astrophotostore.com - from APOD May 1, 2009
We'll see the shooting stars of August 10!
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