Re: M42 in color

A 90m refractor should show lots of violet in M42! Here's a 100m
reflector for comparison:
http://www.gb.nrao.edu/epo/GBT/gbtpix.html

Seriously, it depends a lot on your eyes. I've seen it in an 8 inch,
but it's very subtle. Just a hint of green. To see it clearly, a 16
inch would be my guess. Also, CCD imagers show way more color than can
be seen visually.

.

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