What Happens When a Solar Neutrino Hits Matter?
The Sun is 150 million kilometres away. And yet, something born deep inside it can make a nucleus on Earth move. Not metaphorically. Not theoretically. Measurably. LUX-ZEPLIN has now reported 4.5-sigma evidence for coherent elastic neutrino–nucleus scattering from solar ⁸B neutrinos. A particle crosses the darkness between Sun and Earth. It enters matter almost unnoticed. Then, in a moment smaller than anything human senses can perceive, a nucleus recoils. That recoil is real. That recoil carries momentum. And today, science can measure it.
