Re: [NNagain] Hurling rocks into Earth's gravity well

[Sebastian Moeller <moeller0@gmx.de>]

> On 17. Mar 2025, at 13:41, Douglas Goncz A.A.S. M.E.T. 1990 via Nnagain <nnagain@lists.bufferbloat.net> wrote:
> 
> Hello Dr. David.
> 
> The gravity at the surface of the Moon is larger than might be expected since the volume to radius ratio is as r squared, so that with a difference of 100 times that is a factor of 100x in gravity at surface we can predict that the rocks they'll be throwing at us we'll be falling up that is thrown out of the gravity wall for 1/10 the trip roughly and falling down that is falling into that gravity well for 9/10 of the trip causing an overall Factor of enormous acceleration. Offhand I would say the process would achieve 80% of escape velocity.
> 
> The Australian science agency has a nice chart out for asteroid type objects on their website. It summarizes the relationship between the many many small rocks which are in our system and the very few large rocks which accompany them as they move at various speeds knowing only statistical information about how many rocks of which size and how fast they're moving and what energy the net result is 
> 
> They quote figures of atta joules. So once given the upward that is towards the Earth impetus a mere Boulder could do really significant damage assuming that the transit time could be controlled carefully in their was either accurate aiming or some type of midcourse correction to get the target secured.
> 
> Trying to find my way back on topic to Net neutrality. Maybe a moon base could be set up with a transmitter powered by a small nuclear reactor

Mmmh, radionuclear power generation seems realistic, a nuclear reactor less so, given that you somehow need to dispose of waste heat eventually and vacuum ist a good isolator... then again, for a sufficiently large moon base you might actually want a heating source to make up for the radiative heat loss.

That said, you know what they say about the moon being a harsh mistress, eh?


> receiving signals from Earth and retransmitting them to make the connections for data and voice. Compared to lofting a satellite having the time to construct such an item on the surface of the Moon would be advantageous the way it seems to me. I'm pretty sure that a satellite would have to be put into place in orbit with its power supply and all that and that's what starling does bloody bloody blah.
> 
> By the way I'm running for president. 
> / / < GONCZ2028 > /
> 
> 
> Cheers
> Doug
> 
> 
> 
> 
> 
> On Mon, Oct 7, 2024, 10:04 AM David Bray, PhD <david.a.bray@gmail.com>
> wrote:
> 
> ...
> >
> > Meanwhile China probably will land humans on the moon within the next four
> > years of whomever is the next U.S. President. That may happen before the
> > U.S. returns to the Moon. Either way, a "base" on the Moon by 2035 (which
> > is PRC's goal) even if it's robots - or humans with the risk of loss of
> > life) raises some challenges in terms of SIGINT, GEOINT, and the general
> > ability to hurl rocks into Earth's gravity well....
> >
> 
> 
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