In 1993 Knudsen became part of NASA's Mars team and shortly thereafter Knudsen established the Danish Mars Group together with Lise Vistisen and Morten Bo Madsen.
Madsen participated in the design and analysis of the five Danish magnetic experiments taken on the 1997 Mars Pathfinder mission.
Michael Madsen | Morten Lund | Morten Lauridsen | Morten Lund (musician) | Morten Harket | Morten Frost | Morten Gamst Pedersen | Morten Andersen | Morten Vågen | Morten Korch | Madsen machine gun | Madsen | Chris Madsen | Wayne Madsen | Thomas Madsen-Mygdal | Ole Christian Madsen | Morten Veland | Morten Thrane Esmark | Morten Pedersen | Morten Olsen | Morten Middelfart | Morten Levin | Morten Gunnar Larsen | Morten Christiansen | Morten Bo Madsen | Morten Ansgar Kveim | John M. Madsen | Gordon A. Madsen | Demonstration on November 2013 in Vienna from identitarian patriots for a ''Festung Europa'' and against Morten Kjærum | Claus Madsen |