Eratosthenes lived around 276 to 190 BCE. He was a Greek science author, astronomer, and poet. He developed a technique for the willpower of the Earth’s circumference to inside 5 p.c of the fashionable accepted worth.He additionally measured the tilt of Earth’s axis with great accuracy, compiled a star catalog, worked out a calendar that included leap years, and tried to fix the dates of literary and political events since the siege of Troy. The Pythagoreans assume that the motions of the planets are mathematically related to musical sounds and number. These ideas are called “The Music of the Spheres”.
The changing facets of the revolution of the planets is because, being fastened in their very own circles or in their very own spheres whose actions they observe, they’re carried across the zodiac, just as Pythagoras had first understood it, by a regulated easy and equal revolution but which ends by mixture in a motion that appears variable and unequal. My name is Ourania (Ουρανία) and I shall be posting on the Greek weblog. For those who have questions about my title, in Greek mythology Ourania was the muse of astronomy. As a feminine adjective, ουρανία derives from ουρανός (ouranos =sky) and it means celestial or heavenly.
Yes, there is a whole lot of poetry in the listing but we also mustn’t overlook that in an age with few books or any other recording medium most information was set down and transmitted in some poetic type so as to make it simpler to remember. The rhythms and rhymes of poetry are simply so much simpler to memorize than long passages of prose. Having mentioned that, there are two Muses that have at all times struck me as seemingly misplaced: Clio and especially Urania. What’s the Muse of Astronomy doing in the same household as her poetic sisters?
Galileo Galilei (1564–1642) made elementary discoveries in each astronomy and physics; he’s perhaps finest described because the founder of modern science. Galileo was the primary to make astronomical use of the telescope His discoveries of thelargest moons of Jupiter and the phases of Venus had been persuasive evidence for the Copernican cosmology. His discoveries of craters on the moon and blemishes on the solar ( sunspots ) discredited the traditional belief within the perfection of the heavens. These findings had been introduced in The Sidereal Messenger, a small guide revealed in 1610.
Whether we prefer it or not, the technical details of astronomy have influencedcosmology since the time of the traditional Greeks. The essential two-sphere mannequin (with extra circles or spheres for many who cared about planetary details) becamethe dominant cosmological mannequin throughout the ancient Mediterranean and beyond.Through the Center Ages, Islamic and Christian students adopted this cosmology andincorporated it into their writings with solely minor modifications. (One essential additionwas the location of Heaven, the house of God and angels, simply past thesphere of the celebrities.) This world-view made its manner into essential literaturesuch as Dante’s Divine Comedy
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