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Date: Wed, 10 Apr 2024 01:55:51 -0400
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Subject: Re: Eclipse
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On 4/9/2024 1:22 PM, john larkin wrote:
> On Tue, 09 Apr 2024 11:32:25, Wanderer<dont@emailme.com> wrote:
> 
>> Phil Hobbs wrote:
>>
>>> A pretty good partial eclipse is just ending here. We had about 90%
>>> obscuration here.
>>
>>> George H should have been in the path of totality.  George?  You out there,
>>> man?
>>
>>> Cheers
>>
>>> Phil Hobbs
>>
>> I was on the edge of totality. It lasted one and half minutes. It got colder but it didn't get windy and it got darker but not dark enough to see the stars. I could see Jupiter and Venus. The sky was red along the horizon, so it looked like the eclipse was floating above the sunset.
>>
>> How many planets have intelligent life and a moon the right size and in the right orbit so that someone can see a total eclipse? Our planet is unique in the galaxy.
> 
> We were all on the roof, looking at the eclipse (we got maybe 30%
> here) and we talked about that. Earth is maybe too good to be an
> accident.
> 
> We're lucky that birds can fly, and water exists in three states, and
> that we can see the stars.
> 

Just a few high cirrus outside Boston so pretty good viewing weather.

90% coverage here felt like about 35% darker in the visible, but the 
temperature drop and lack of IR on the skin is very noticeable. Not sure 
what the incident power has to drop to for it to seem like twilight in 
visible light as compared to a sunny day, maybe 0.1% of 1000 watts/m^2?

The return of the IR doesn't feel linear either, at some point as 
coverage wanes it feels like it ramps up from not much to 100% over 
about 30 seconds.