Astronomy 1020L – Supplements – The Sun Lab 2017-08-05 by R David Rivero Click Thumbnail to View Full-Sized Image Eclipse WL (White Light) CA (K-line of Calcium) HA (Hydrogen Alpha) YK (X-ray) A1 A2 A3 A4 Layer 1 Date 1 Date 2 Date 3 Date 4 Date 5 Rotation 1 Rotation 2 Rotation 3