This is a continuation of a project I started about 2,5 years ago when I worked on a mosaic of Messier 106, made using images of the Hubble Space Telescope. In 2015 I found some new data sources on the internet, including some huge telescope databases with data from professional telescopes. That’s when I decided …
This image shows one of the toughest objects I have ever imaged. This is PuWe (Purgathofer-Weinberger) 1 (also known as PGN 158.9+17.8), a very weak planetary nebula in the constellation of lynx. The nebula was discovered in 1980 (original discovery paper: http://goo.gl/fW6TQB) by Purgathofer and Weinberger on the Palomar Deep Sky Survey prints. The nebula …