Old Man Posted April 8, 2015 Report Share Posted April 8, 2015 What's happening at Fukushima isn't stupidity. Not at all. Quote Link to comment Share on other sites More sharing options...
L. Marcus Posted April 8, 2015 Report Share Posted April 8, 2015 Willful culpability? Quote Link to comment Share on other sites More sharing options...
Old Man Posted April 8, 2015 Report Share Posted April 8, 2015 Willful negligence and illegal dumping of radioactive materials, at least. You could probably throw some fraud and racketeering in there as well. It's been four years and they still don't know where the corium is. Quote Link to comment Share on other sites More sharing options...
L. Marcus Posted April 8, 2015 Report Share Posted April 8, 2015 Sleeping with the fishes. Quote Link to comment Share on other sites More sharing options...
Bazza Posted April 8, 2015 Report Share Posted April 8, 2015 I wonder how accurate this Venus poster is. It says: "An accurate scientific drawing of Venus' amazing pattern around the Earth" The image is too big to embed so link here: http://venusposter.com Quote Link to comment Share on other sites More sharing options...
L. Marcus Posted April 8, 2015 Report Share Posted April 8, 2015 Venus does follow that pattern, and it's a pretty poster ... Quote Link to comment Share on other sites More sharing options...
Bazza Posted April 8, 2015 Report Share Posted April 8, 2015 Cool. Cheers, I'll wait for a second and professional opinion. Quote Link to comment Share on other sites More sharing options...
L. Marcus Posted April 8, 2015 Report Share Posted April 8, 2015 I'm a pro! Not at orbital mechanics, sure, but I get paid for what I do ... Quote Link to comment Share on other sites More sharing options...
Bazza Posted April 8, 2015 Report Share Posted April 8, 2015 *smiles*. you know I was referring to Cancer. L. Marcus 1 Quote Link to comment Share on other sites More sharing options...
Bazza Posted April 8, 2015 Report Share Posted April 8, 2015 These two look interesting books for budding geometers. Drawing Geometry: A Primer of Basic Forms for Artists, Designers and Architects Geometry is both elegantly simple and infinitely profound. Many professionals find they need to be able to draw geometric shapes accurately, and this unique book shows them how. It provides step-by-step instructions for constructing two-dimensional geometric shapes, which can be readily followed by a beginner, or used as an invaluable source book by students and professionals. Making Geometry: Exploring Three-Dimensional Forms Following on from his successful Drawing Geometry, Jon Allen explores the creation of the many-sided three-dimensional forms known as the Platonic and Archimedean solids. Based on patterns of equally spaced points on a sphere, these polyhedra have been the fundamentals of geometric exploration for millennia. Many professionals find they need to be able to build three-dimensional shapes accurately, and understand the principles behind them. This unique book shows them how to make models of all the Platonic and Archimedean solids, as well as several other polyhedra and stellated forms. It provides step-by-step instructions for constructing the three-dimensional forms, as well as showing how to draw out accurately the geometry of the paperfold nets. Beginners and experienced artists and designers alike will find this book a source of practical guidance, as well as delight and inspiration which will amply repay the careful attention needed to construct the models. Quote Link to comment Share on other sites More sharing options...
Bazza Posted April 8, 2015 Report Share Posted April 8, 2015 These two look interesting books for budding geometers. Drawing Geometry: A Primer of Basic Forms for Artists, Designers and Architects Making Geometry: Exploring Three-Dimensional Forms Pariah could use them as chemistry text, as molecules form many of the Platonic and Archimedean solids. Plus it is a way to emphasis that math is practical (and well as slipping in a potentially useful skill) Quote Link to comment Share on other sites More sharing options...
L. Marcus Posted April 8, 2015 Report Share Posted April 8, 2015 Anyway - Earth and Venus have an orbital resonance of, I think, five to three; that is, for every three orbits Earth completes, Venus completes five. Hence the pattern on the poster. Quote Link to comment Share on other sites More sharing options...
Bazza Posted April 8, 2015 Report Share Posted April 8, 2015 So a ratio of 3:5. Very interesting, both 3 and 5 are special numbers. Edit: I thought there is a Pythagorean tuning for 3:5 but nope. Darn. Quote Link to comment Share on other sites More sharing options...
L. Marcus Posted April 8, 2015 Report Share Posted April 8, 2015 Pythagoras the Mathematician is worthy of all respect, but Pythagoras the Mystic just makes me wanna raise an eyebrow. Quote Link to comment Share on other sites More sharing options...
Bazza Posted April 8, 2015 Report Share Posted April 8, 2015 You know you can't have one without the other? Quote Link to comment Share on other sites More sharing options...
L. Marcus Posted April 8, 2015 Report Share Posted April 8, 2015 He thought he couldn't; I can. Quote Link to comment Share on other sites More sharing options...
Cancer Posted April 8, 2015 Report Share Posted April 8, 2015 Note that the interactions of orbits of bodies makes for perturbations and slow changes to those orbits. The Solar System has been around for 4.5 Gyr or so, but things are definitely not now where they started out. It isn't known, even, if the system is dynamically stable for another 5 Gyr. Quote Link to comment Share on other sites More sharing options...
L. Marcus Posted April 8, 2015 Report Share Posted April 8, 2015 Long odds. Quote Link to comment Share on other sites More sharing options...
Cancer Posted April 8, 2015 Report Share Posted April 8, 2015 Well, it has lasted 4.5 Gyr so far. Though it must be admitted that we don't really know how many objects have been lost from the system in that time interval. And we know a great many have been lost. Quote Link to comment Share on other sites More sharing options...
L. Marcus Posted April 8, 2015 Report Share Posted April 8, 2015 Lost planets, roaming the void between stars, with nothing to keep them company except a rogue comet and a band of space pirates .. Quote Link to comment Share on other sites More sharing options...
Cancer Posted April 8, 2015 Report Share Posted April 8, 2015 Some got accreted, too. Quote Link to comment Share on other sites More sharing options...
L. Marcus Posted April 8, 2015 Report Share Posted April 8, 2015 But that's not loss, is it? Quote Link to comment Share on other sites More sharing options...
Cancer Posted April 8, 2015 Report Share Posted April 8, 2015 Well, tell that to the accreted object. Quote Link to comment Share on other sites More sharing options...
L. Marcus Posted April 8, 2015 Report Share Posted April 8, 2015 Can't -- it's accreted. Quote Link to comment Share on other sites More sharing options...
Cancer Posted April 8, 2015 Report Share Posted April 8, 2015 Bazza, there are lots of resonant effects in orbital mechanics, and the Earth-Venus system is one such. So while I hadn't seen that graphical presentation before, I kind of knew some of the information that went into making it. OTOH, those resonant conditions can change. They tend to be stable for extended periods of time, and then undergo a "sudden" large change. This is the way of chaotic systems, in the modern mathematical meaning of chaos. Lots of studies of the dynamical evolution of the Solar System have been done, though I don't know of a layman-level book I can direct you towards on this topic. Quote Link to comment Share on other sites More sharing options...
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