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.

An Egyptian astronomer called Ptolemy (AD100-168) described one of the earliest ideas for how the Solar System is structured. Ptolemy’s model and many earlier ideas of the Solar System had the ...

This study challenges traditional models of solar system formation, which predict that Jupiter, Saturn, Uranus, and Neptune should have nearly circular and flat orbits. The research suggests that ...