Jason Ou Posted 11 days ago Fred Jansen: How to land on a comet It's pretty stunning to me when I watched the video! I've always been curious about things in the entire universe, and this video is very informative. It is shocking when I realized the comet is 500 million kilometers away. I do appreciate your sharing with us! I learned so much about how the project Rosetta works, how to use flybys to gain velocity and the way to map the comet etc. It's amazing! Please keep us updated about the lander!