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- Newsgroups: sci.space
- Path: sparky!uunet!munnari.oz.au!uniwa!DIALix!metapro!bernie
- From: bernie@metapro.DIALix.oz.au (Bernd Felsche)
- Subject: Re: Methods for meteor avoidance
- Message-ID: <1992Jul26.071133.18449@metapro.DIALix.oz.au>
- Organization: MetaPro Systems, Perth, Western Australia
- References: <a6cf4fff@Kralizec.fido.zeta.org.au> <BrwIxr.5Bv@zoo.toronto.edu>
- Date: Sun, 26 Jul 92 07:11:33 GMT
- Lines: 46
-
- In <BrwIxr.5Bv@zoo.toronto.edu> henry@zoo.toronto.edu (Henry Spencer) writes:
-
- >In article <a6cf4fff@Kralizec.fido.zeta.org.au> brendan.woithe@f820.n680.z3.fido.zeta.org.au (Brendan Woithe) writes:
- >>After the meteor from last year passed withinn 4 minutes of the earth (the
- >>large one), I was wondering if we have any system of avoiding these
- >>large beasts??!! ...
- >>With a problem like this, surely there must be some defence!!!
-
- >There has been discussion of this, both in the past and recently. The big
- >problem is detecting them far enough in advance. Given adequate advance
- >warning, one could use large nuclear bombs to destroy or deflect the incoming
- >rock, in principle. There is a practical problem in that the US currently
- >has no launcher adequate to the job; there are some things for which there
- >is no substitute for a Saturn V or equivalent.
-
- Since it's a global problem, we can resort to global
- resources. I'm sure that the Russians would not object to
- some of their spare boosters being used to save their butt
- too!
-
- I believe that current capabilities would require very long
- range detection so that the minor deflection which could be
- imposed using a deliverable load would be significant enough
- to prevent large particles entering the atmosphere. Major
- unknowns are the velocity and mass of the threatening
- meteor, so the kinetic energy required cannot be easily
- determined.
-
- If the blast could be "focused", then the size of the
- explosion can be reduced, as the imposed velocity component
- can be at the optimum direction to prevent collision with
- the Earth, as well as avoiding dangerous proximity of large
- meteors.
-
- For very large meteors, it may actually be more practical to
- subtly change our own orbit (not through nuclear explosions!),
- though the environmental impact of doing this is mind-blowing.
- In the event, it'll be a question of our survival in a
- changed world vs. extinction and destruction of the planet.
-
- How we change the orbit is left as an exercise for the student. :-)
- --
- +-----+ Bernd Felsche _--_|\ #include <std/disclaimer.h>
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