No and No , remember that the back ground objects ( stars ) are basically at infinity and even our 12 month orbit of the sun wont register as moving stars at about 20 light years ( zero movement seen ) I love parallax , works to a degree , now remember Jupiter is 120,000 km across ( it's actually large enough at 440 million km's and 120 thousand km across to be seen at 1x magnification ( our eyes ) as a tiny disc , on a good night ,,,, of course ) that's why the planets don't twinkle like stars ( look it up ) .
It's all about angles (a long isosceles 440 000 000 million km on both sides triangle by the visual angular diameter of Jupiter , at 1x ) , its a very slender 2 lines that at first glance would look parallel to the un-educated , Hypotenuse was a Genius .
Brian.
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Originally Posted by Stonius
I'm not sure that's right. If it made Jupiter look as it would if it was 200 x closer, wouldn't it therefore have a larger angular size relative to background objects? This would affect the timings of moon transits and star occultations, surely? If you take a photo and blow it up x 2, or halve your eyepiece focal length you get the same result, right? Or am I misunderstanding what you meant?
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