1,721,124 research outputs found

    Mozart gioca a dadi: Musica e calcolo combinario nel XVIII secolo

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    Seminario tenuto nell'ambito delle iniziative di Pianeta Galileo 201

    Venus’s Phases: Evidence Supporting Heliocentrism

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    The affirmation of the Copernican system marks a milestone in the history of science. However, in educational settings, theoretical and philosophical aspects are often prioritized, with less attention paid to the empirical and quantitative data supporting heliocentrism. The discovery of Venus phases by Galileo Galilei through his early telescope represents a compelling piece of evidence corroborating the Sun-centered model. A renowned drawing published in Galilei's treatise ‘Il Saggiatore’ (1623) illustrates this phenomenon and the anti-correlation between phases and apparent diameter. The analysis of the illustration reveals precise quantitative information comparable in accuracy to that which can be extracted from contemporary astrophotography. Inspired by this result, the galileian discovery has been revisited and tailored into activities suitable for both high school and college teaching levels. These activities invite students to construct their own empirical evidence for heliocentrism by analyzing digital images and using interactive digital tools for image manipulation. The topic has also been proposed at the university level through more advanced analysis techniques. The common aim at each level is to engage students in a dynamic ‘learning by doing’ experience, replicating pivotal moments from the history of science and transforming a topic traditionally confined to the history of ideas into a living, interactive subject

    Precise measurement of the η\eta and K0K^{0} masses

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    New measurements of the η\eta and K0K^{0} masses have been performed using decays into 3π03\pi^{0} with the NA48 detector at the CERN SPS. Using symetric decays to reduce systematic effects, the results M(η)=547.843±0.051M(\eta) = 547.843 \pm 0.051 MeV/c2^{2} and M(K0)=497.625±0.031M(K^{0}) = 497.625 \pm 0.031 MeV/c2^{2} were obtained

    Il temperamento, una questione musicale e scientifica

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    Seminario tenuto al Conservatorio di Siena nell'ambito delle iniziative di Pianeta Galileo 201

    Aristarco di Samo rivisitato

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    In occasione dell’eclissi lunare del 15 giugno 2011 abbiamo raccolto una sequenza di immagini digitali della luna parzialmente eclissata tra il terzo e il quarto contatto. In seguito le immagini sono state analizzate e hanno permesso di misurare la distanza Terra-Luna impiegando il metodo geometrico ideato dall’astronomo greco antico Aristarco di Samo. La misura costituisce una verifica della gravitazione newtoniana ed è stata inserita in un percorso dedicato alla gravitazione elementare rivolto alle scuole medie superiori nell’ambito del Piano Nazionale Lauree Scientifiche. Il percorso è stato proposto anche a studenti del primo anno di università. In questo lavoro presentiamo il metodo di Aristarco e discutiamo le differenti tecniche di analisi che abbiamo adottato secondo le diverse tipologie di studenti cui ci siamo rivolti. L’argomento ha avuto successo presso insegnanti e studenti e mostra come certi contenuti, tradizionalmente relegati in ambito storico, possono essere de-musealizzati e rivelare interessanti potenzialità didattiche

    Musica e Rivoluzione Scientifica

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    Seminario Tenuto durante le iniziative di Pianeta Galileo 201

    A long range sighting and terrestrial refraction

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    The sighting of a distant island fixed on a digital image allowed us to measure the refraction coefficient and probe terrestrial refraction models. The measurement has been proposed to first-year students of Physics on behalf of the geometrical optics course held at Pisa University. The argument is inspired by a passage from Snell’s seminal treatise on geodesy raising the issue of terrestrial refraction, and it is developed in learning by doing context in which students are solicited to (re)construct a theory and compare measurements with simulation
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