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I was watching the Mercury transit yesterday and took a few drawings off the images projected by my Newtonian. I'd like to get the directions right on the drawings. Where do S and W lie? I thought I had it worked out but I'm not so sure.  And where can I find an explanation of the optical processes involved in the reversing, flipping, etc of images in optical trains? Thanks!

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Good that you remind me with your question. I have just posted some sketches without giving the wind directions a thought. I guess it is a good habit, adding those to the sketch.

Edited by Linda
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1 hour ago, Teletom said:

I was watching the Mercury transit yesterday and took a few drawings off the images projected by my Newtonian. I'd like to get the directions right on the drawings. Where do S and W lie? I thought I had it worked out but I'm not so sure.  And where can I find an explanation of the optical processes involved in the reversing, flipping, etc of images in optical trains? Thanks!

Thanks!

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