[NatureNS] rainbow at night?

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Date: Mon, 21 Apr 2008 19:18:36 -0300 (ADT)
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Here in Samsonville (pop. 200) I guess the conditions were just right at
the time.  Thanks for the info.  By the way, to me it appeared
colour-less, but my daughters (23 & 25) and my wife all said they could
see colours.
Billy

> Hi all:
>
>  From p.189 of the 2008 RASC Handbook (section written by Roy Bishop):
>
> ====
> Rainbows at night:
> Observations of lunar rainbows are rare. The Moon is bright enough to
> produce a noticeable rainbow only when it is near its full phase. Also,
> people are usually indoors at night, and when they do step outside it
> is often into a light-polluted environment, which rules out any chance
> of seeing a lunar rainbow. Even when conditions are favourable, few
> people would notice a lunar rainbow because it is too dim to activate
> colour vision and therefore appears white.
> ====
>
> Note, that like the Sun, to see a rainbow at night you would have to
> have your back to the Moon, and a line connecting the Moon and your
> head would point to the centre of the bow.
>
> Pat
>
>
>
> On Apr 19, 2008, at 7:21 PM, Margaret E.Millard wrote:
>
>> out here along the shore often when there is a moon shining through
>> either wispy low cloud or fog/mist there is quite often a moray or
>> rainbow sometimes more clearly visible than others. I find my glasses,
>> they have the sun protection built in,  adds to it.
>> Marg Millard, White Point, Queens
>> http://margmillard.ca
>> ----- Original Message ----- From: "David & Alison Webster"
>> <dwebster@glinx.com>
>> To: <naturens@chebucto.ns.ca>
>> Sent: Saturday, April 19, 2008 11:20 AM
>> Subject: Re: [NatureNS] rainbow at night?
>>
>>
>>> Northern Lights ?
>>> DW
>>>
>>> bdigout@seaside.ns.ca wrote:
>>>
>>>> As we arrived home this evening  in Samsonville at 9:00 P.M. there
>>>> was a
>>>> light arc in the nnw, going from the horizon up about 20 degrees and
>>>> back
>>>> to the horizon.  There was a light mist at the time, but also a full
>>>> moon.
>>>> Does anybody have an idea what it might be?
>>>> Billy
>>>>
>>>
>>
>>
>
> ========================================================================
> ==
> Patrick Kelly
> Director of Computer Facilities
> ========================================================================
> ==
> Faculty of Architecture and Planning
> Dalhousie University
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