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 sinuous
> 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?

-- 
Thomas

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