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vib wrote:
> Impacts at these high speeds produce shock waves in solid materials,
> and both impactor and the material impacted are rapidly compressed to
> high density. Following initial compression, the high-density, over-
> compressed region rapidly depressurizes, exploding violently, to set
> in train the sequence of events that produces the impact crater.
> Impact-crater formation is therefore more closely analogous to
> cratering by high explosives than by mechanical displacement. Indeed,
> the energy density of some material involved in the formation of
> impact craters is many times higher than that generated by high
> explosives. Since craters are caused by explosions, they are nearly
> always circular - only very low-angle impacts cause significantly
> elliptical craters.
> 
> http://en.wikipedia.org/wiki/Impact_crater
> 
> pa nije bas ultra uvjerljivo, ali ajde, nek im bude...

Pa, objašnjenje i nije loše za upadne kuteve veće od ~60°, ali ako si
pokušam vizualizirati udar pod kutem od recimo 45°, naprosto očekujem da
 ejecta preuzme moment kretanja od bolida i razleti se asimetrično.
Pitanje je jedino koliki je udio ejecte u formativnoj tvari kratera.

- --
http://www.danijel.org/
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