Um espelho que reflecte a vida, que passa por nós num segundo (espelho)

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Fev 13

 

At the current rate that near-Earth asteroids are being detected, it will take astronomers 15 years to identify every one of significant size and even more than 10 times longer to characterize their materials.

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Astronomers should dramatically ramp up the sky surveys, not only to better prepare for threats to Earth but also to exploit asteroids' contents.

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These asteroids could be mined one day for valuable metals such as platinum and cobalt, yet at the current rate it will take 190 years to characterize their materials.

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Like the moon, Earth is pockmarked with craters caused by asteroid impacts, suggesting that such strikes happen frighteningly often.

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During the Tunguska event in 1908 in Siberia, up to 80 million trees were wiped out in a mostly uninhabited 830-square-mile area (2,150 square kilometers) by an exploding space rock. The meteorite blast packed up to 1,000 times the power of the Hiroshima bomb.

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Asteroids aren't just potential threats to Earth's safety they are also potential sources of rich veins of platinum, cobalt, zinc, antimony and other valuable metals that might one day be harvested by manned missions. They could even be mined for hydrogen and oxygen for space travelers refueling their rockets.

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Scientists have estimated that 20,000 asteroids lurk in the solar system, of which only 6,000 have been identified.

 

(texto e imagem – space.com)

publicado por Produções Anormais - Albufeira às 15:58

Julho 2019
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