NASA proposes building artificial magnetic field to restore Mars’ atmosphere – ExtremeTech

Green notes that advances coming out of plasma physics could allow for the future development of inflatable structures that can generate a magnetic dipole of 1 or 2 tesla. That could [be] enough to shield Mars against the solar wind, and it wouldn’t need to be anything near as large as the planet itself.

The Planetary Science Division worked with scientists from Ames Research Center, the Goddard Space Flight Center, and a number of universities to run simulations of this scenario (PDF). The team found that a magnetic shield would allow Mars’ atmosphere to find a new equilibrium. Currently, it has stabilized at roughly 1% the density of Earth’s atmosphere, thanks to the release of gases from internal pockets. With the shield, that could increase by several times and allow the surface temperature to rise to an average of 4 degrees Celsius (7 degrees Fahrenheit).

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[E]ven Fox didn’t tout Bartiromo’s big scoops on Trump’s legislative agenda, because 10 months into the Trump presidency, nobody is so foolish as to believe that him saying, “We’re doing a big infrastructure bill,” means that the Trump administration is, in fact, doing a big infrastructure bill. The president just mouths off at turns ignorantly and dishonestly, and nobody pays much attention to it unless he says something unusually inflammatory.On some level, it’s a little bit funny. On another level, Puerto Rico is still languishing in the dark without power (and in many cases without safe drinking water) with no end in sight. Trump is less popular at this point in his administration than any previous president despite a generally benign economic climate, and shows no sign of changing course. Perhaps it will all work out for the best, and someday we’ll look back and chuckle about the time when we had a president who didn’t know anything about anything that was happening and could never be counted on to make coherent, factual statements on any subject. But traditionally, we haven’t elected presidents like that — for what have always seemed like pretty good reasons — and the risks of compounding disaster are still very much out there.

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So, does Mitchell make any money on the work, which has been shared so many times? He uploaded a high-res image of the symbol and granted permission for anyone to use it personally for free. But for those who want to support his work or simply want something readymade, you can also buy T-shirts, sweatshirts, mugs, and journals emblazoned with the symbol through Threadless.“I really just want to spread the image as much as possible and cement it in history,” Mitchell says. “In all honesty, the amount I’ve made from my Threadless shop so far is still less than my hourly rate, so I don’t really see it as a big deal. If you look at my Twitter, half the replies are people wanting to know where they can buy a shirt. Threadless is happy to help them out with that, and so I’m happy to let that happen.”Now that the symbol has flooded our streets and our timelines, Mitchell just has one request: “Impeach this idiot already,” he says.

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