Since the start of the first satellite in 1957 Earth's orbits have accumulated 10 times more artificial debris objects than active satellites – and that is only what can be monitored from Earth.
The big sky theory led to the assumption that space is vast and that there is enough room for everyone. After 60 years of spaceflight countless invisible fragments and particles are the result and pose risk to our satellite missions. With the current trend to launch mega - constellations like OneWeb or SpaceX current efforts to mitigate further space debris generation might not be sufficient. The impact of these constellations are currently under investigation. If constellation operators neglect more strict mitigation measures, then the risk of catastrophic collisions will rise and thus might trigger the collisional cascade as it was graphically demonstrated in the movie Gravity.
Mr. Christopher Kebschull, is a mechanical engineer and project scientist at the Institute of Space Systems of the Technische Universität Braunschweig. Germany Since 2011 he has been researching in the field of modelling the space debris environment. Among other projects he is involved in the development of the two European reference tools MASTER and DRAMA, which can be used to quantify and mitigate the risk to satellite missions. Since 2015, he is working on a tool chain to estimate the performance of Space Situational Awareness systems.