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A History of Astronomy from Thales to KeplerThis is the only detailed history of early astronomy available in English. Formerly published under the title History of the Planetary Systems from Thales to Kepler, it is recognized as a masterpiece of both historical insight and scientific accuracy. Beginning with the astronomical ideas of the ancient Egyptians, Babylonians, and pre philosophic Greeks (Homer and Hesiod), it moves up through Thales, Anaximander, Anaximenes, Xenophanes, Parmenides,
This is the only detailed history of early astronomy available in English. Formerly published under the title History of the Planetary Systems from Thales to Kepler, it is recognized as a masterpiece of both historical insight and scientific accuracy.Beginning with the astronomical ideas of the ancient Egyptians, Babylonians, and pre-philosophic Greeks (Homer and Hesiod), it moves up through Thales, Anaximander, Anaximenes, Xenophanes, Parmenides, Heraclitus, Empedocles, Democritus, and other early Greek cosmologists. The Pythagoreans are considered next, with their occasionally remarkable anticipations of modernity, and then Plato's astronomical thought. The enormously important system of concentric spheres for planets, usually associated with Eudoxus, is described in detail, followed by a discussion of Aristotle, Heraclides, and Aristarchus. The theory of epicycles -- which held for almost 2,000 years -- is then considered, with chapters on the dimensions of the world and the finished Ptolemaic system.
Medieval European and Islamic cosmologies are then described in detail. Nicolas of Cusa, Regiomontanus, Calcagnini, and other transitional figures from the Middle Ages to the Renaissance are then followed by detailed chapters on Copernicus, Tycho Brahe, and Kepler.
"Standard reference on Greek astronomy and the Copernican revolution." -- Sky and Telescope.
"A classical book in the field of the history of astronomy."-- Philosophy and Science.
Binding Type: Paperback
Publisher: Dover Publications
Published: 12/08/2011
ISBN: 9780486600796
Pages: 464
Weight: 0.97lbs
Size: 7.97h x 5.44w x 0.92d
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★★★★★ 1
Made for very small dogs- don’t buy if you have medium to large dogs
Size: Extra Small, Color: Blue
2 of my 3 dogs chewed right threw it <5 minutes of getting it causing a potential choking hazard. It’s small not durable but definitely soft. Only suitable for very small dogs
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Reviewed in the United States on April 17, 2026
★★★★★ 5
Chew rope
Size: Small 15", Style: 3 Knot, Pattern Name: Dog, Size: Small 15", Style: 3 Knot, Pattern Name: Dog
Works great for my goldendoodle. It’s held up well to two dogs and lots of playing. It’s nice and large and has held up outdoors in Michigan winters
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Reviewed in the United States on June 6, 2026
★★★★★ 5
Sturdy and holding up so far!
Size: Small 15", Style: 3 Knot, Pattern Name: Dog
This is a quality pull toy that my Yorkie ("Finnegan") loves. It is holding together well as my dog can be a maniac at times. Moderate chewing has not hurt this toy. I do not buy toys with squeakers in them as they worry me. Finn entertains himself and then brings toy to me for a tug of war. I recommend this item. Good bang for the buck!
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Reviewed in the United States on February 2, 2026
★★★★★ 4
Strong
Size: Medium 20", Style: 3 Knot, Pattern Name: Dog
For a five month old puppy with sharp teeth it’s holding up pretty well.
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Reviewed in the United States on March 27, 2026
★★★★★ 5
EXCELLENT QUALITY
Size: Medium 20", Style: 3 Knot, Pattern Name: Dog
I have a German Shepherd/Pointer mix who is 10 months old. He has been in the throes of teething and destructive exploration. He's chewed up clothing and shoes. He chewed a hole in our couch and one in our brand new mattress (He was never left home alone until this point but as my mother came to visit and my boyfriend was back at work, I had no choice but to trust him alone for about an hour a day for 3 or 4 days... he clearly didn't earn that trust). He loves ropes because he can gnaw them, whip them around, and play tug of war or fetch with them at any given time. We love ropes because they keep him occupied and relieve his desire to chew things. Unfortunately, he was destroying rope after rope after rope. Some ropes were worrisome because they would quickly start fraying and falling apart. We would have to help remove strings he has swallowed from his behind while he was out doing his business... My boyfriend's mother picked up a Mammoth TireBiter tire and rope toy for him but it was much too small. Still, he loved it and it stood up very well to his chompers despite being way too small/weak for him. Looking for a larger version of the Mammoth TireBiters, I stumbled across this rope toy and gave it a shot. Let me tell you, I don't think I will ever buy rope toys from any other brand! We have had this rope for over a month and it is still going strong. It does show some small signs of wear and tear but you would swear we bought it last week. It is very strong and durable. It has held up through many long gnawing sessions. It has been put through countless hours of fetch and tug of war with no signs of giving out any time soon. I am so in love with this rope and so is my pup!
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Reviewed in the United States on September 13, 2020