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15th century BC - Wikipedia, the free encyclopedia (348 words) |
 | 1504 BC — 1492 BC — Egypt conquers Nubia and the Levant. |
| 1487 BC — Amphictyon, son of Deucalion and Pyrrha and legendary King of Athens, dies after a reign of 10 years and is succeeded by Erichthonius I of Athens, a grandson of Cranaus. |
| 1437 BC — Legendary King Erichthonius I of Athens dies after a reign of 50 years and is succeeded by his son Pandion I. |
| Hipparchos (2429 words) |
| After that from 141 BC to 127 BC he lived mostly on the island of Rhodes, again in Alexandria, in Siracuse[?], and around 130 BC in Babylon. |
| After that he 135 BC enthusiastic of nova star in constellation of Scorpius with equatorial armillary sphere measured ecliptical coordinates of about 850 (1600 or 1080, which is false quoted many times elsewhere) and till 129 BC he made first big star catalogue. |
| Hipparchus had in 134 BC ranked stars in six magnitude classes according to their brightness: he assigned the value of 1 to the 20 brightest stars, to weaker ones a value of 2, and so forth to the stars with a class of 6, which can be barely seen with the naked eyes. |
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