"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 solar behaviour from an era when systematic telescopic observations were only beginning."
Framing: assertive ·
First seen: 2026-09-13 ·
Last seen: 2026-09-13 ·
Spread: 1 articles