Op 14/09/2021 om 10:14 schreef Thomas de Groot:
> Op 14-9-2021 om 01:35 schreef Samuel B.:
>> Thomas de Groot <tho### [at] degrootorg> wrote:
>>> Op 13/09/2021 om 01:14 schreef Samuel B.:
>>>> P.S. If you look closely, you'll find some interesting things... You
>>>> can see
>>>> what appears to be scratches in the moon's surface.(...) You'll also
>>>> see what appears to
>>>> be drifts of dust forming sinuous ridges.
>>> The short answer, for both features: Lunar Rills --> either collapsed or
>>> not, lava tunnels.
>> Thanks for the new term. I think you may be right... mostly.
>> However, I'm not convinced everything we are referring to are the same
>> structures. I looked up an atlas of known moon rilles, and the
>> features I was
>> initially observing weren't highlighted on the map, nor were what I
>> saw when I
>> made my first remarks things that resembled rilles in their entirety.
>> But I'm
>> also not /un/convinced! Some of what I saw may have indeed been
>> collapsed lava
>> tubes. But some were also on higher portions of low, sloping hills...
>> the kind
>> of place you would expect a glancing asteroid to leave a mark. And the
>> ridges I also observed looked like dust that piled up by heavy winds.
>> But since
>> I am fully willing to be wrong, I'll accept any and all corrections to my
>> misconceptions ;D
> It /was/ the short answer ;-)
> There probably is happening more than just rills indeed, but I don't
> know what they could be. There are features that look like lava flows,
> like in the upper part, against the terminator, and seemingly coming
> from a (impact) crater. Could you point out those things you see? I am
> unable to relate them to something I recognise.
> Otherwise, what does NASA say about it all?
Other thought: You are not pointing to the impact ejecta surrounding
many craters (Tycho is a good example) and extending over significant
portions of the lunar surface sometimes, are you? In close up, they
could be the "sinuous ridges" you mentioned.
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