The Oort cloud is traditionally thought of as a vast shell of perhaps trillions of icy objects encasing our solar system ... its makeup might be. At a heliocentric distance ranging from 10,000 ...

TIMHi, I'm Tim Peake. I'm an astronaut based here at the European Space Agency in Germany, and from December 2015, to June 2016, I spent six months orbiting Earth on the International Space Station.