Tunguska Blast Was a Small Asteroid

malachiorion writes "The Tunguska event, an explosion on June 30, 1908, cleared an 800-sq.-mi. swath of Siberian forest. Was it a UFO crash? An alien weapons test? Now, Sandia National Laboratories has released its own explanation for the Tunguska event. Using supercomputers to create a 3D simulation of the explosion, the Department of Energy-funded nuke lab has determined that Tunguska was, indeed, the explosion of a relatively small asteroid. The simulation videos are well worth checking out — they show a fireball slamming into the earth from the asteroid's air burst. The researchers caution that we should be keeping watch for many more small, potentially earth-impacting asteroids than we are currently tracking."

Comments

Re:Hmm..

[teebob21]

Would there be any chance of a small asteroid (one that could cause some problems) currently heading for earth not be detected yet by scientists? Yes. There is a very real chance that a chunk of rock the size of a basketball court could come at us tomorrow. A very very small, but very real chance. Asteroids that come from the sunward side of Earth's orbit are harder to detect because they are obscured by the Sun. One could come from that direction and astronomers may never see it. Most of the meteors that streak across the night sky are space stones no bigger than your hand, and usually about the size of a pea or smaller. Larger ones come down, but very infrequently. It is impossible for astronomers to chart, track or project the trajectories of the billions of space rocks left over from the formation of the Solar System.

Imagine a world where a small asteroid fragment or comet had struck Russia 60 years after Tunguska - during the depths of the Cold War. It would be a very different world today indeed.

Currently Reading.

[Daemonax]

I'm currently reading Arthur C. Clarke's 'Rendezvous with Rama', which opens with the lines "Soon or later, it was bound to happen. On June 30, 1908, Moscow escaped destruction by three hours and four thousand kilometers -- a margin invisibly small by the standards of the universe."

In the book, we humans then go on to set up systems to track asteroids that may be a danger to earth, and set up defense systems against them. I know that we currently track some, but how well funded are these organizations that do this? This is really something that is quite important, as it is almost certainly just a matter of when, not if. Do we have systems in place that will allow us to destroy or divert any large asteroids that are determined to be on a path to impact with earth?