Measuring angular separation

Asked by Zenpi314

Would it be very hard to implement a measuring tool for getting angular separation between objects.
While some programs have a dedicated tool for that, other programs, like 'Guide', have the angular separation in memory of the last two objects selected. The answer can then be reached by clicking on an assigned button (like 'insert' in the Guide program).
I have no idea how hard it would be to achieve and I don't know if I'm the only one who would like this info, but I thought I would ask.

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Nightshade Legacy Edit question
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Lionel RUIZ (astro2kpremium) said :
#1

Nightshade is intended to be used into a planetarium.
That way, it's really hard to manipulate the mouse on a spherical wall with movements really unusual.

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