Object of the Week, February 02, 2020 - Two Abell Planetary Nebulae in Orion

[Bertrand Laville]

Hi Owen,

This is a very interesting remark.
When we used to say "OIII", this is not enough precise; we should say "OIII with red lines" or "OIII without red lines".
Concerning "my" OIII, the answer is at: http://www.deepsky-drawings.com/moye...res/dsdlang/fr
For instance, you should have a look at: http://www.deepsky-drawings.com/sh2-276/dsdlang/fr

Hope this could be useful for all of us
Bertrand
http://www.deepsky-drawings.com/