Tree rings chart more than 1,000 years of solar activity
Researchers have reconstructed solar activity back to the year 969 using measurements of radioactive carbon in tree rings. Those results help scientists better understand the dynamics of the sun and allow more precise dating of organic materials using the C14 method. What goes on in the sun can only be observed indirectly. Sunspots, for instance, reveal the degree of solar activity—the more sunspots are visible on the surface of the sun, the more active is our central star deep inside. Even t...
Nicolas Brehm Lukas Wacker Laboratory Of Ion Beam Physics Lund University Max Planck Institute For Solar System Research Ion Beam Physics
Source: futurity.org