This is the first ever experimental colour image from the Rothney Astrophysical Observatory Baker-Nunn telescope. It is of the planetary nebula M27. The BN was never designed to do colour images so we've been experimentally using theatrical gels over the full aperture to do the three RGB filters.
Taken on 21 July 2017, the second image is the full frame. There is some vignetting in the full frame.
M78 is a reflection nebula located about 1340ly from Earth in the constellation Orion.
The blue colour of reflection nebulae comes from the fact that the dust particles, due to their size, preferentially scatter blue light, letting the redder light pass through. We only see the scattered blue light that has been reflected towards us.
Still need more? Here is an animated GIF of the two images being "blinked"
Need a hint? Here is the same field taken 2 days earlier.
Teacher, astronomer, political scientist and father. I wrote a book once: http://evl.link/df
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