helix_ap180edt_fp_ml4022_12hrs

Comment

Comment by Robert C. Mills on December 7, 2011 at 7:26am

The He is striking around central star. Nice image.

Comment by Ian G on November 19, 2011 at 12:33pm

LOVE it! He II brings so much additional detail. Makes me want to get it to.

Comment by Richard Crisp on May 19, 2011 at 3:14am

Glad you like it Spike
the Helium II is an interesting emission line. At 468nm it is only found surrounding very hot stars (like greater than 100,00K) such as white dwarves commonly found in the center of a PNe

I have a few other images using Helium II that I will post in coming days. One of M27 and another of M57. The Crab also has Helium II emission

Comment by spike77 on May 19, 2011 at 2:39am

let me b the first to say wow man awesome