Asteroids could be deflected with spray paint
ANI : Washington, Mon Feb 25 2013, 15:18 hrs
A Texas A 'n' M University aerospace and physics professor is planning to deflect a killer asteroid by using paint. The science behind the plan is so absolutely rock solid that even NASA is getting involved and wants to know much more.
Dave Hyland, professor of physics and astronomy and also a faculty member in the aerospace engineering department at Texas A 'n' M and a researcher with more than 30 years of awards and notable grants, said one possible way to avert an asteroid collision with Earth is by using a process called 'tribocharging powder dispensing' – as in high pressured – and spreading a thin layer of paint on an approaching asteroid, such as the one named DA14 that came within 17,000 miles on Feb. 15.
What happens is that the paint changes the amount by which the asteroid reflects sunlight, Hyland theorizes, producing a change in what is called the Yarkovski effect (which was discovered by a Russian engineer in 1902).
The force arises because on a spinning asteroid, the dusk side is warmer than the dawn side and emits more thermal photons, each photon carrying a small momentum. The unequal heating of the asteroid results in a net force strong enough to cause the asteroid to shift from its current orbit, Hyland further theorizes.
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For February 25, 2013 Monday
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