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NASA proposes artificial magnetic field to make Mars a secondhome
On 3/16/2017 10:25 AM, dlzc wrote:
On Wednesday, March 15, 2017 at 8:41:45 PM UTC-7, Yousuf Khan wrote: The article you linked to is from 2011, and it's about a totally different issue. It's about an early warning system for solar winds, so putting a satellite at the L1 would encounter the solar wind 43 minutes before Mars itself does. But due to the higher speed of light, which gets to Mars in 3.5 seconds, you have 43 minutes - 3.5 seconds of early warning about it. The issue here is not about early warning, but about redirecting the solar winds completely from Mars. So early warning really has no bearing on anything here, except that if the parameters of the magnetic shield need to be adjusted, you have about 7 seconds of turn around time to react from Mars. The solar wind takes 43 minutes to reach the orbit of Mars. So a "shadow" in solar wind created by an object at the L1 point, crosses Mars orbit 61,920 km BEHIND Mars. Mars is only 7000 km in diameter. David A. Smith I don't get what you're saying here! Presumably, they can angle the magnetic field far enough in advance to aim the solar wind "shadow", right as Mars is passing through it. Yousuf Khan |
#32
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NASA proposes artificial magnetic field to make Mars a second home
Dear Yousuf Khan:
On Saturday, March 18, 2017 at 1:10:20 AM UTC-7, Yousuf Khan wrote: On 3/16/2017 10:25 AM, dlzc wrote: On Wednesday, March 15, 2017 at 8:41:45 PM UTC-7, Yousuf Khan wrote: The article you linked to is from 2011, and it's about a totally different issue. It's about an early warning system for solar winds, so putting a satellite at the L1 would encounter the solar wind 43 minutes before Mars itself does. But due to the higher speed of light, which gets to Mars in 3.5 seconds, you have 43 minutes - 3.5 seconds of early warning about it. The issue here is not about early warning, but about redirecting the solar winds completely from Mars. So early warning really has no bearing on anything here, except that if the parameters of the magnetic shield need to be adjusted, you have about 7 seconds of turn around time to react from Mars. The solar wind takes 43 minutes to reach the orbit of Mars. So a "shadow" in solar wind created by an object at the L1 point, crosses Mars orbit 61,920 km BEHIND Mars. Mars is only 7000 km in diameter. I don't get what you're saying here! Sure you do. Presumably, they can angle the magnetic field far enough in advance to aim the solar wind "shadow", right as Mars is passing through it. Only with "new physics". Either they make a symmetric field 20 times the diameter of what is required (because we only know how to make symmetric fields), or they add a small amount of energy to keep the source that far ahead of Mars. David A. Smith |
#33
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NASA proposes artificial magnetic field to make Mars a secondhome
On 3/18/2017 12:05 PM, dlzc wrote:
Presumably, they can angle the magnetic field far enough in advance to aim the solar wind "shadow", right as Mars is passing through it. Only with "new physics". Either they make a symmetric field 20 times the diameter of what is required (because we only know how to make symmetric fields), or they add a small amount of energy to keep the source that far ahead of Mars. You can do it with multiple satellites each orbiting around the L1 point, they can all be adjusted individually and oriented individually. |
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