SpaceSolar maximum? Oh, you just missed it The sun reached peak activity in its northern hemisphere in 2011 it seems, with the southern half lagging behind – it may signal the coming of an extended quiet phase News
SpaceMysterious Pioneer anomaly: 'This is the answer' Astrophysicist Slava Turyshev has explained away decades of exotic speculation over the Pioneer anomaly, the puzzling slowdown of two NASA probes Opinion