On that note.. For this logo I actually documented some of my process. What did I know about them already, what came to mind when I thought of it..
The blackhole theme resonated with me so I sketched up a basic plan and then went hunting fonts (font name next to it for easy referral)
Having settled on the Andtioh font, it just meant putting it all together.
Started with a black circle and used that as a guideline to create a ring. Copious amounts of colour overlay and outerglow
Added a background and added a twirl effect at various speeds as it went out
Brought back up the background opacity, and added a lens flare to the top left
Finally added the font and....