Analyses on Christoph Clavius' Reports of Total Solar Eclipses in 1560 and 1567: Key References for the Centennial Variations of the Earth's Rotation Speed and the Solar Radius

arXiv:2607.02347 · astro-ph.SR, physics.geo-ph, physics.hist-ph, physics.space-ph · Submitted 2026-07-02 · Read on arXiv

Hisashi Hayakawa, Mitsuru Sôma, Jean-Pierre Rozelot, Koji Murata, Alexei A. Pevtsov, Stanislav Gunár, Lucie M. Green

astro-ph.SR, physics.geo-ph, physics.hist-ph, physics.space-ph

Submitted: 2026-07-02

Comments: 20 pages, 5 figures, and accepted for publications in the Astrophysical Journal Letters

Journal ref: The Astrophysical Journal Letters, 2026

DOI: 10.3847/2041-8213/ae84b7

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Terminology

• Calibration — 1× in this paper · explained in 7 episodes
• Commentary — 1× in this paper · explained in 2 episodes
• Core — 1× in this paper · explained in 2 episodes

Sources

• How big is the Sun: Solar diameter changes over time

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