Ronald Stoyan is editor-in-chief of Interstellarum, one of Germany's main astronomy magazines. He was the founding director of the German deep sky organization 'Fachgruppe Deep-Sky', and has authored and coauthored six books on practical astronomy.
Stefan Binnewies is a leading astrophotographer and travels around the world to get the best shots. He has worked on several amateur observatory projects, including helping to establish the Capella Observatory near Windhoek, Namibia.
Susanne Freidrich is an editor for Interstellarum and a visiting scientist at Max-Planck-Institute for extraterrestrial physics. A trained astrophysicist, she has been observing the sky both visually and photographically for more than 25 years.
Klaus-Peter Schroeder is Professor of Astronomy at the University of Guanajauto, Mexico. An avid amateur astronomer and photographer since youth, he has published several books on astrophotography and is a regular contributor writing for amateur astronomy magazines.