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== Summary == | == Summary == | ||
Animation of the observations made by Galileo Galilei in early 1610 of the four | Animation of the observations made by Galileo Galilei in early 1610 of the four what he called "stars in the heavens moving about Jupiter, as Venus and Mercury round the Sun". | ||
The open circle represents Jupiter and the asterisks represent the four 'stars', now known to be | The open circle represents Jupiter and the asterisks represent the four 'stars', now known to be its four largest moons, Io, Europa, Ganymede, and Callisto. | ||
His observations after just four days persuaded him that the 'stars' were orbiting Jupiter because, as he wrote, "the revolutions are so swift that an observer may generally get differences of position every hour". | His observations after just four days persuaded him that the 'stars' were orbiting Jupiter because, as he wrote, "the revolutions are so swift that an observer may generally get differences of position every hour". | ||
===External Links=== | ===External Links=== | ||
* [https://la.wikisource.org/wiki/Sidereus_nuncius Original ''Sidereus Nuncius'' text], the book published by Galileo Galilei in 1610 | * [https://la.wikisource.org/wiki/Sidereus_nuncius Original ''Sidereus Nuncius'' text], the book published by Galileo Galilei in 1610 with the scanned drawings of his observations | ||
* The [https://en.wikisource.org/wiki/The_Sidereal_Messenger English translation] thereof | * The [https://en.wikisource.org/wiki/The_Sidereal_Messenger English translation] thereof | ||
* The associated [https://en.wikipedia.org/wiki/Sidereus_Nuncius Wikipedia entry] | * The associated [https://en.wikipedia.org/wiki/Sidereus_Nuncius Wikipedia entry] | ||
Latest revision as of 15:54, 23 April 2022
Summary
Animation of the observations made by Galileo Galilei in early 1610 of the four what he called "stars in the heavens moving about Jupiter, as Venus and Mercury round the Sun".
The open circle represents Jupiter and the asterisks represent the four 'stars', now known to be its four largest moons, Io, Europa, Ganymede, and Callisto.
His observations after just four days persuaded him that the 'stars' were orbiting Jupiter because, as he wrote, "the revolutions are so swift that an observer may generally get differences of position every hour".
External Links
- Original Sidereus Nuncius text, the book published by Galileo Galilei in 1610 with the scanned drawings of his observations
- The English translation thereof
- The associated Wikipedia entry
File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 14:40, 25 February 2022 |  | 800 × 128 (64 KB) | Matthew (talk | contribs) | Animation of the observations made by Galileo Galilei in early 1610 of the four of what he called "stars in the heavens moving about Jupiter, as Venus and Mercury round the Sun". The open circle represents Jupiter and the asterisks represent the four 'stars', now known to be the four largest moons, Io, Europa, Ganymede, and Callisto. His observations after just four days persuaded him that the 'stars' were orbiting Jupiter because, as he wrote, "the revolutions are so swift that an observe... |
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