A newly launched satellite aims to measure how Earth's rotation drags the fabric of space-time around itself - an effect of Einstein's general theory of relativity - ten times more accurately than ever before. The Laser Relativity Satellite 2 (LARES-2) launched from the European Space Agency (ESA) spaceport in Kourou, French Guiana, on 13 July.

KB: We asked ourselves, "what obliquity, what misalignment would Planet Nine induce in the solar system?" because it must induce some. We know that Planet Nine's orbit in inclined. As a result, when Planet Nine torques the rest of the solar system, the two sort of act as two precessing tops.