On 13-10-2013 0:41, posfan12 wrote:
> "posfan12" <nomail@nomail> wrote:
>> One thing I'd like to know is how many shadow squares are there supposed to be?
>>
>> If they're supposed to be 2500000 miles long and 13000000 miles from the center
>> of the sun, then there should be 41 of them assuming they're spaced equally
>> apart.
>>
>> Is that right?
>
> Damn my math!
>
> That should be ~16 not 41.
>

According to my macro there are 20. 18 degrees from shadow square center 
to shadow square center; 360/18. I don't remember if this is mentioned 
in Larry Niven's books but it might be.

Thomas

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