Fwd: [Fictionary] HYETAL results!

[Hutch]

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> 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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