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The Discoveries of Galileo – Part 4: Venus

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#1 E-Ray

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Posted 01 April 2021 - 05:18 AM

Galileo’s discoveries of Jupiter, sunspots, and the Moon were covered in parts 1 through 3 of this series. This article will cover an important discovery that Galileo made in late 1610 of his observations of Venus.

Click here to view the article
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#2 Hax

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Posted 02 April 2021 - 06:02 AM

Nice read, thank you kindly
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#3 Special Ed

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Posted 02 April 2021 - 12:26 PM

Ed,

 

Thanks for Part 4.  smile.gif   Interesting to read and follow his reasoning as to why the Copernican system had it right.  And all because he could see the previously unknown phases with a telescope.

 

In my "following in the footsteps of Galileo" sketching project with my Galileoscope, the only observation of his I have left to do is to to record the phases of Venus.


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#4 UnitronTony

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Posted 04 April 2021 - 11:41 AM

Galileo's observation of the gibbous phase for Venus is arguably the most crucial of his many important discoveries. Yet historians often overlook its significance. This article clearly explains why it disproved the geocentric hypothesis. Well done, E-Ray!


Edited by UnitronTony, 04 April 2021 - 11:41 AM.

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#5 Quaternion

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Posted 12 April 2021 - 06:05 AM

Thank you so much for researching and sharing this with the community. It is eye opening.  Did Galileo coin the term "naked eye", since you have it in your quote from him above?


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#6 E-Ray

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Posted 13 April 2021 - 11:21 AM

Hi Quaternion, Good question. I'm not sure where the term "naked eye" came from and could be word selection from the translation that Stillman Drake made from Italian to English.

 

Ed 

Thank you so much for researching and sharing this with the community. It is eye opening.  Did Galileo coin the term "naked eye", since you have it in your quote from him above?



#7 Doc Willie

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Posted 16 April 2021 - 10:19 AM

Many years ago, I attempted to do the Galileo Challenge: replicate all his observations in one night. My results are here: http://www.willieyee...bVNBGihLi1tt-c 


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#8 dUbeni

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Posted 17 April 2021 - 12:46 PM

I do have Galileo "Sidereus Nuncius" fac simile, with translation, and was always fascinated by the way he describes his findings, it must have been truly astonishing for him to observe and confirm Copernicus theories.

 

Bernardo


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