The introduction of unnatural-looking purple stars to your image, is a common problem with processing narrowband images in the well-known Hubble colour palette (or âSHOâ image).
There are several ways to deal with this inâ¦
Astro Pixel Processor or simply APP is a complete deep sky image processing application with several innovative features.
The Crescent Nebula (NGC 6888) is an emission nebula in the constellation Cygnus, about 5000 light-years away from Earth.
A few weeks ago(April 9th), there was a One-Click Observation of Messier 87 with the