Re: Asteroid/Comet Defense -- Has anyone thought of this

On Oct 14, 2:00 am, Sylvia Else <syl...@xxxxxxxxxxxxxxxxxxx> wrote:
AlfredMontestrucwrote:
Ok, one of the big problems has been listed has been that a really big
asteroid or comet can be hell to deflect because of its huge mass. My
though is to use leverage as in many, many smaller asteroids exist in
orbit with much smaller mass that can be given much much larger
changes in velocity much cheaper.

Hit the big asteroid or comet with a much smaller one that has the
most optimum combination of mass, and orbital vector, and proximity to
either earth or prepositioned spacecraft capable of deflection. This
impact (most of the velocity difference will be natural, we just steer
it a bit) will create a huge impulse on the dangerous large comet or
asteroid to deflect it away from earth.

Or just knock some bits off.

Not if the hit is well centered. The robot rides the asteroid in
making corrections to the last possible moment.

One significant problem is that many such
objects may be nothing more than rubble piles. The same is true of the
smaller masses you're talking about using as missiles.


How is that a problem? You do understand don't you that at impact
velocities over about 8km/sec (low end of the scale) is going to
vaporize the whole impactor and much of the target, the shockwave of
the expanding gas will violently shove



Sylvia.


.

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