186 citations
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physics.pop-ph2023
The Asymmetric Sunrise Effect on Thales' Alleged Measurement of the Sun Angular Size
Jorge Cuadra
Reports from the 2nd and 3rd Century AD attribute the first measurement of the angular size of the Sun to Thales of Miletus, in the 6th Century BC. Cleomedes, also in the 2nd Centu…
physics.pop-ph2020★ 11 cited
Qualitative classification of extraterrestrial civilizations
Valentin D. Ivanov, Juan Carlos Beamin, Claudio Caceres +1
Abridged: The interest towards searches for extraterrestrial civilizations (ETCs) was boosted by the discovery of thousands of exoplanets. We turn to the classification of ETCs for…