SpaceSun's cosmic ray shadow is solar storm predictor The sun creates a shadow on cosmic ray detectors that varies with its magnetic activity and could lead to an early warning system for solar storms 51¶¯Âþ
SpaceObese black holes outshone stars in earliest galaxies Collapsing gas clouds in the very young universe could have formed many "obese" black holes, pouring out energy that is still visible today 51¶¯Âþ