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Asteroids hit the Earth more often than thought
As show in this map, small space asteroids hit the Earth more often than commonly thought. We’re continuing our recent asteroid theme. According to this map, small asteroids were documented hitting the earth 556 times in the twenty year from 1994 to 32013. Nasa notes that “almost all were harmless.” Ahhh, well, almost all, except for that Chelyabinsk event. (The study of these unlikely but potentially catastrophic “Black Swan” events, like the Carrington Event, is another topic we’ve discussed before (here).) Recall the Chelyabinsk event broke a lot of windows and caused a lot of other damage in rural Siberia (and made for some pretty spectacular video). Good thing Siberia is rural, because the Chelyabinsk event _only_ released 20-30 times more energy than the atomic bomb over Hiroshima. And it wasn’t detected before it entered Earth’s atmosphere. So maybe that early warning system needs some work if we want to continue feeling smug and so much superior to the dinosaurs.… Read the restWolfram mathematica: data visualization example
This is example of visualization using Wolfram Mathematica, a commercial software package. We’ve previously discussed some of Wolfram’s other products and ideas in an earlier post on digital physics and cosmology as well as in our posts on IBM Watson. One of the reasons that data visualization remains something of a black art is that there are so many data visualization packages out there. Each package has its strength in a few kinds of plots or types of visualizations. Some of the better packages are commercial (and, unfortunately, not necessarily inexpensive). The high prices mean the experience of any practitioner is likely to be limited to a few commercial visualization packages over the course of a career (since most sites will only license a few packages). Open source data visualization packages are therefore very powerful, since they potentially combine the best of free tools. There are very good free tools out there.… Read the restRecent Posts
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