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Description
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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Product Reviews
★★★★★ 5
Lots of slots to power devices all at once
Style: 7-in-1 USB-C Hub
Well made, good price, outlets precision sized so cords don't droop or fall out. Overall about as a compact as it could be. Enough power to plug into iPad and power phone, hearing aid charging box , and AA battery 4 slot charger.
Worth paying a little more for more slots.
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Reviewed in the United States on June 9, 2026
★★★★★ 1
Be aware of bad units being sold right now.
Style: 4-in-1 USB-C Hub
These USED to be a 5 star product from me, I've lost count how many I have purchased and included built into my products I manufacture. All of 2025 NO ISSUES at all, battle tested in the photo event industry buy some very large companies I have as clients. Come 2026 and the last two batch orders I have purchased I have had to replace 10 of them within a 2 month window, all for different customers because they stopped working in a short amount of time. Something happened in the Belkin manufacturing of these hubs in the past 3 months and I have lost my confidence in the stock that is available right now, I have moved to another HUB manufacturer for my products. I even tried calling Belkin quietly to make them aware of this issue and could not get anyone who cared that they had bad units being sold. So now it's to be very public about this issue and to let people know to be aware there ARE bad units in circulation of these hubs. ALWAYS have a backup on hand just in case! Sorry Belkin, you need to have a better process to receive feedback from other manufacturers that use your products in theirs. I hope I can regain confidence again someday.
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Reviewed in the United States on April 9, 2026
★★★★★ 4
Nice portable USB hub.
Style: 4-in-1 USB-C Hub
Nice little hub - output is 40 w though so a slow charger if using it to charge a phone off of a computer.
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Reviewed in the United States on March 17, 2026
★★★★★ 5
This hubs got what I need and drives seem to mount right away.
Style: 5-in-1 USB-C Hub
Might be a little early to write this review. But, I feel like I keep buying these types of hubs and they never seem to have the right configuration for what I need. Two USB-Cs, Two USBs and an HDMI. Appreciate that the ports are all on the same side so I don't have a spider web of cables going in every direction. They all fit rather snugly. MOST IMPORTANTLY, every external drive and flash drive seems to mount right away.
I have had major frustrations over the years with external drives not mounting or taking forever to mount. I'm sure most of this is due to the failing drives themselves, but I have a sneaking suspicion the hubs are playing a role too, but I don't have the electrical engineering degree to prove it.
Anyway, so far so good with this one.
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Reviewed in the United States on June 4, 2026
★★★★★ 5
Work as expected
Style: 4-in-1 USB-C Hub
Work as expected. Plug and play. For a USB-C hub, worth the price. Had no compatibility issues with my PC and a laptop. Haven't noticed any heat issues.
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Reviewed in the United States on May 8, 2026