XPost: sci.space.science
From: bondage@frontiernet.net
Sander Vesik wrote:
>
> In sci.space.tech Scott T. Jensen wrote:
> > I'm up on the Space Station and I go out for a nice little space walk. I
> > take along my specially designed hunting rifle and fire a bullet down at
the
> > planet. What would the bullet need to be made of for it to make it all the
> > way to the surface and not burn up on entry to our atmosphere? Is there
> > anything the bullet could be made of that would be able it to make the
trip?
> > And would the speed of the bullet affect its chances? Would also the
bullet
> > go weird like how bullets do when you shoot them into a pool of water?
>
> If the bullet reaces surfaces then changes are good you left Earth
> Orbit... The major effort is not making the bullet reach surface but
> maiking a gun that could impart it with enough velocity. You couldn't
> achieve it with a chemical gun, for example.
>
> >
> > Idly curious,
> > Scott Jensen
>
> --
> Sander
>
> +++ Out of cheese error +++
If you fire opposite orbital direction, you've effectively given it a
'de-orbit' burn. Its perigee will be low enough to enter the atmosphere.
After that, it's a matter of what it's made of, and how much it
weighs, compared to the entry surface area. I don't know if it would
stay in a 'flat' attitude, or end up entering nose-first. (or something
more complex, once friction slows the spinning I assume it was given
from barrel rifling)
If you fire it *ahead,* you've given it an orbit with a higher apogee
than before, and added to the orbital debris situation. (shame on you)
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