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  2. Letters on Sunspots - Wikipedia

    en.wikipedia.org/wiki/Letters_on_Sunspots

    Letters on Sunspots (Istoria e Dimostrazioni intorno alle Macchie Solari) was a pamphlet written by Galileo Galilei in 1612 and published in Rome by the Accademia dei Lincei in 1613. In it, Galileo outlined his recent observation of dark spots on the face of the Sun. [ 1 ] His claims were significant in undermining the traditional Aristotelian ...

  3. Sunspot drawing - Wikipedia

    en.wikipedia.org/wiki/Sunspot_drawing

    In 1612, Galileo Galilei was writing letters on sunspots to Mark Welser. They were published in 1613. In his telescope, he saw some darker spots on Sun's surface. It seems like he was observing the Sun and drawing sunspots without any filter, which is very hard.

  4. Sunspot - Wikipedia

    en.wikipedia.org/wiki/Sunspot

    Download as PDF; Printable version; In other projects ... Sunspots are temporary spots on the Sun ... sunspots by Christoph Scheiner and Galileo Galilei. [16] Galileo ...

  5. Discourse on Comets - Wikipedia

    en.wikipedia.org/wiki/Discourse_on_Comets

    The Discourse on Comets (Italian: Discorso delle Comete) was a pamphlet published in 1619 with Mario Guiducci as the named author, though in reality it was mostly the work of Galileo Galilei. In it Galileo conjectured that comets were not physical bodies but atmospheric effects like the aurora borealis. [1]: 62

  6. Solar observation - Wikipedia

    en.wikipedia.org/wiki/Solar_observation

    Galileo Galilei almost certainly began telescopic sunspot observations around the same time as Harriot, given he made his first telescope in 1609 on hearing of the Dutch patent of the device, and that he had managed previously to make naked-eye observations of sunspots. He is also reported to have shown sunspots to astronomers in Rome, but we ...

  7. Scientists reveal shock findings about the Sun’s magnetic field

    www.aol.com/scientists-reveal-shock-findings-sun...

    Galileo documented sunspots on the star, which mark magnetic solar activity, as far back as 1612. Since then, he and the researchers that followed him have been puzzled by where exactly that ...

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  9. Galileo Galilei - Wikipedia

    en.wikipedia.org/wiki/Galileo_Galilei

    Galileo di Vincenzo Bonaiuti de' Galilei (15 February 1564 – 8 January 1642), commonly referred to as Galileo Galilei (/ ˌ ɡ æ l ɪ ˈ l eɪ oʊ ˌ ɡ æ l ɪ ˈ l eɪ /, US also / ˌ ɡ æ l ɪ ˈ l iː oʊ-/; Italian: [ɡaliˈlɛːo ɡaliˈlɛːi]) or mononymously as Galileo, was a Florentine astronomer, physicist and engineer, sometimes described as a polymath.

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