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A Model of the Cosmos in the ancient Greek Antikythera Mechanism. The newly-discovered periods for Venus and Saturn are unknown from studies of Babylonian astronomy.

A Model of the Cosmos in the ancient Greek Antikythera Mechanism

Figure 2 explores how these periods might have been derived. Clues came from the Babylonian use of linear combinations of periods designed to cancel out observed errors14. Figure 2a shows how this might generate the periods for Venus and Saturn, but choosing the correct linear combinations essentially uses knowledge about errors in known period relations relative to the true value. The lack of fine error-estimates from antiquity excludes these methods for our model: errors like < 1° in 100 years for (720, 1151) were beyond the naked-eye astronomy of the Hellenistic age.

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Pentagon releases UFO videos for the record

Dancing gargantuan black holes perform on cue. Media playback is unsupported on your device Astronomers have been able to test key consequences of Einstein's theories by studying the way a couple of black holes move around each other.

Dancing gargantuan black holes perform on cue

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ISS crew blast off after long quarantine

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Could the Big Bang have created a hidden 'twin' Universe? - BBC Reel

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Docking gives Intelsat telecoms satellite new lease of life

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Stars align for epic space missions

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James Webb Space Telescope comes together

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Milky Way galaxy is warped and twisted, not flat

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Moon landings: What was the 1969 Apollo 11 mission?

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