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  • Italy
    Thursday Jan 7, 1610
    Galileo Galilei

    "Three fixed stars, totally invisible by their smallness"

    Italy
    Thursday Jan 7, 1610

    On 7 January 1610, Galileo observed with his telescope what he described at the time as "three fixed stars, totally invisible by their smallness", all close to Jupiter, and lying on a straight line through it.




  • Italy
    1610
    Galileo Galilei

    Galileo used a telescope at close range to magnify the parts of insects

    Italy
    1610

    In 1610, Galileo used a telescope at close range to magnify the parts of insects.




  • Italy
    Aug, 1610
    Galileo Galilei

    Letter to Kepler

    Italy
    Aug, 1610

    In a letter to Kepler of August 1610, Galileo complained that some of the philosophers who opposed his discoveries had refused even to look through a telescope: My dear Kepler, I wish that we might laugh at the remarkable stupidity of the common herd. What do you have to say about the principal philosophers of this academy who are filled with the stubbornness of an asp and do not want to look at either the planets, the moon or the telescope, even though I have freely and deliberately offered them the opportunity a thousand times? Truly, just as the asp stops its ears, so do these philosophers shut their eyes to the light of truth.




  • Italy
    Sep, 1610
    Galileo Galilei

    Galileo observed that Venus exhibited a full set of phases similar to that of the Moon

    Italy
    Sep, 1610

    From September 1610, Galileo observed that Venus exhibited a full set of phases similar to that of the Moon. The heliocentric model of the Solar System developed by Nicolaus Copernicus predicted that all phases would be visible since the orbit of Venus around the Sun would cause its illuminated hemisphere to face the Earth when it was on the opposite side of the Sun and to face away from the Earth when it was on the Earth-side of the Sun.




  • Italy
    Thursday Jan 7, 1610
    Galileo Galilei

    "Three fixed stars, totally invisible by their smallness"

    Italy
    Thursday Jan 7, 1610

    On 7 January 1610, Galileo observed with his telescope what he described at the time as "three fixed stars, totally invisible by their smallness", all close to Jupiter, and lying on a straight line through it.




  • Italy
    1610
    Galileo Galilei

    Galileo used a telescope at close range to magnify the parts of insects

    Italy
    1610

    In 1610, Galileo used a telescope at close range to magnify the parts of insects.




  • Italy
    Aug, 1610
    Galileo Galilei

    Letter to Kepler

    Italy
    Aug, 1610

    In a letter to Kepler of August 1610, Galileo complained that some of the philosophers who opposed his discoveries had refused even to look through a telescope: My dear Kepler, I wish that we might laugh at the remarkable stupidity of the common herd. What do you have to say about the principal philosophers of this academy who are filled with the stubbornness of an asp and do not want to look at either the planets, the moon or the telescope, even though I have freely and deliberately offered them the opportunity a thousand times? Truly, just as the asp stops its ears, so do these philosophers shut their eyes to the light of truth.


  • Italy
    Sep, 1610
    Galileo Galilei

    Galileo observed that Venus exhibited a full set of phases similar to that of the Moon

    Italy
    Sep, 1610

    From September 1610, Galileo observed that Venus exhibited a full set of phases similar to that of the Moon. The heliocentric model of the Solar System developed by Nicolaus Copernicus predicted that all phases would be visible since the orbit of Venus around the Sun would cause its illuminated hemisphere to face the Earth when it was on the opposite side of the Sun and to face away from the Earth when it was on the Earth-side of the Sun.


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