Mike Safyan Mike Safyan Director of Launch and Regulatory Affairs, Planet Labs, California All articles
Thorsten Schmidt Thorsten Schmidt Chef and restaurateur All articles
Daniel Schubert Daniel Schubert German Aerospace Center (DLR), Bremen, Germany All articles
Daniel Scuka Daniel Scuka Senior Editor for Spacecraft Operations, EJRQuartz for European Space Agency. Credit: ESA CC BY-SA IGO 3.0 All articles
John B. Sheldon John B. Sheldon Chairman and President, ThorGroup GmbH All articles
Viktor A. Shor Viktor A. Shor Leading scientific specialist, Institute of Applied Astronomy of the RAS All articles
Karelle Siellez Karelle Siellez Postdoctoral researcher in astrophysics, working at the Center for Relativistic Astrophysics of Georgia Tech Atlanta, GA) and is a member of the LIGO team All articles
Carla Signorini Carla Signorini European Space Agency All articles
Michael Simpson Michael Simpson Executive Director, Secure World Foundation All articles
Clive Simpson Clive Simpson Managing Editor, ROOM - The Space Journal All articles
Mark Sims Mark Sims Beagle 2 Mission Manager All articles
Adam Smith Adam Smith Security Consultant, BAE Systems Applied Intelligence All articles
Vladimir Solntsev Vladimir Solntsev President of RSC Energia All articles
Nick Spall Nick Spall space and science writer All articles
Alan Stern Alan Stern Chief Scientist, World View All articles
Nicole Stott Nicole Stott Astronaut, artist and motivational speaker All articles
Leopold Summerer Leopold Summerer European Space Agency All articles