Re: Mars
- From: "Robin Wier" <rwier@xxxxxxxxxxxxxx>
- Date: 05 Aug 2005 17:52:27 EDT
...................................................................
>> and will appear 25.11 arc seconds wide. At a modest
>> 75-power magnification, Mars will look as large as the full moon to the
>> naked eye.
>
> I simply don't believe that.
....................................................................
The math works out. 25.11" X 75 = 1883.25" divide by 60 = 31.2 arc minutes.
The angular size of the moon varies ~10% depending on it's distance from the
Earth, but averages about 30 arc minutes.
This means that if you were looking at Mars with a 75X telescope using your
right eye and you kept your left eye open and could see the Moon with it,
the Mars in the 75X scope would appear about the same size as the Moon would
with the 1X eye view.
.
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