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RE: Spectral lines - playing with light waves
Here is a photo from 60cm telescope, I took some years ago. It is Dumbell nebula which is planetary nebula with green and red emission lines.
Nebula ... :>)
A bunch of gas hanging around bound by gravity. :)
The best-known catalogue of nebulous objects in the sky is made by Messier - all the things can be seen from Earth - most of it with just binoculars. They are just diffuse and foggy. :)
IF that was the question at all :D
Thanks for the response @svemirac...
I wasn't asking a question lol … I was merely attempting to show my enthusiasm for your posting the planetary nebula photo that you took.