Is it wrong to find pictures of destruction beautiful? This is a frame from a supercomputer simulation of the Tunguska meteorite. It exploded over Siberia in 1908 and flattened miles of trees. The simulation suggests that the devastation could have been caused by a far smaller explosion than previously thought--3 to 5 megatons, instead of 10 to 20. And since there are many more asteroids in that smaller size range, the risks of a devastating impact may be greater than previously thought. Maybe not enough to cause mass extinctions, but to knock out a fair piece of real estate. Go here to read more and to watch a series of simulation movies.
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The good news is that the object that hit the earth at Tunguska 1908 was much smaller than previously thought. The bad news is that the object that hit the earth at Tunguska 1908 was much smaller than previously thought. In other words, if such a small object can do so much damage, then the…
tags: researchblogging.org, Tunguska event, Siberian explosion, Podkamennaya Tunguska River, Lake Cheko, planet earth, astronomy
Flattened trees cover vast areas of Northeastern Siberia
after the mysterious Tunguska explosion in June, 1908.
Image: TASS/Sovfoto (public domain?) [larger view].…
In 1908, a huge fireball streaked across the sky and exploded a few kilometers above the Earth's surface, downing trees for miles and miles around but leaving no impact crater on the ground. This mystery was known as the Tunguska event.
But how did this happen? The amount of energy released was…
“Don't wake me for the end of the world unless it has very good special effects.” -Roger Zelazny
It's always the ones you least expect that get you the worst, it seems. I went to bed last night excited that Asteroid 2012 DA14, a 200,000 ton asteroid, was going to pass within just 28,000 km (or 17,…
Impresionant and really very interesting. Thanks