Scientists used centuries-old aurora sightings to reconstruct 8 solar cycles from 1560 to 1640; their method placed solar minima within 2 years with more than 90% reliability
Centuries-old reports of strange lights in the night sky have helped scientists reconstruct a missing chapter in the Sun’s history. A study published in Scientific Reports by Kristof Petrovay, Laura G. Magyar and Hisashi Hayakawa has reconstructed eight solar activity cycles between 1560 and 1640 using historical records of aurorae, offering a way to trace … Read more