Fwd: [Fictionary] HYETAL results!

[Jean-Joseph Cote]

No, no, I think it should be "semperumbra", or something similar.

Jean-Joseph

On 12/25/2013 12:50 AM, Hutch wrote:
> In this blog report of a seminar on the (apparently increasing) 
> likelihood of water ice in deep, permanently shadowed craters on 
> Mercury's poles, the author repeatedly uses the phrases "permanent 
> shadow" and "permanently shadowed".
>
> http://www.planetary.org/blogs/guest-blogs/2013/lpsc2013-mercury-shadowed-craters.html
>
> These three articles about similar phenomena on Luna use the same phrases.
>
> http://www.esa.int/Our_Activities/Space_Science/SMART-1/Shackleton_crater_SMART-1_s_search_for_light_shadow_and_ice_at_lunar_South_Pole
>
> http://onlinelibrary.wiley.com/doi/10.1029/2002GL016180/full
>
> http://www.lpi.usra.edu/meetings/lpsc2013/pdf/2590.pdf
>
> If there's an astronomy word for this, it seems likely that it's as 
> obscure as OUR words. So I propose we invent the word.
>
> "Umbra" is the astronomy word for shadow. Specifically, it means the 
> center portion of the eclipse shadow. The word is Latin for "shade" or 
> "shadow"
>
> "Perpetual" or "Permanent" both come from Latin, thus would be good 
> matches for "Umbra". So ...
>
>      "perpetumbra"
>      "permanumbra"
>
> ... seem the best choices. I'm inclined toward the latter: as being 
> similar to "permafrost" and "penumbra". Now we just need to find an 
> excuse to get it into publication and then call the publication to the 
> attention of the scientists in the articles cited above. *G*
>
>      "Mercury's Permanumbra
>      "Search for Permanumbral Ice at Lunar South Pole"
>      "Permanumbra in Simple Craters Near the Lunar Poles"
>      "Characterization of Lunar Polar and Non-Polar Permanumbra 
> Physical and Thermal Characteristics"
>
> BB,
> Hutch
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>
> On Tue, Dec 24, 2013 at 8:36 PM, eLLioTT morEton <em at swarpa.net 
> <mailto:em at swarpa.net>> wrote:
>
>     On Mon, 23 Dec 2013, Jim Moskowitz wrote:
>
>         Elliott: "Someone must have a name for this (ecologists?
>          orienteers? real-estate agents?).
>
>
>     *Does* anyone know what it's called?  Is there an astronomy word
>     for a body that is permanently in the shadow of another?
>
>     Regards,
>     em
>
>

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