Helix Nebula NGC 7293

- a large object with low surface brightness it is the closest known planetary nebula to us (~700ly). Radiation emitted by the  extremely hot dying star in the centre causes many shells of gas previously blown off by the star to fluoresce producing the observed colours.

 

Camera: SBIG STL11000M, Astrodon filters Scope: Takahashi TOA-130, f=1000mm, f7.7 (fov (cropped) ~0.6x0.5)
Mount: Takahashi EM-200 Temma2 Guiding: External (E-finder)
Filters/Exposures: L:R:G:B = 2x15:2x15:2x15:2x15min2h00m Location: LMDSS Heathcote, Victoria, Australia
Date: October 2010 Processing: CCDStack2, MIRA AL8 and Photoshop CS5 (reprocessed Sept 2012)