Tag Info

Hot answers tagged

17

Anaxagoras (500 BCE–428 BCE): Anaxagoras brought philosophy and the spirit of scientific inquiry from Ionia to Athens. His observations of the celestial bodies and the fall of meteorites led him to form new theories of the universal order. He attempted to give a scientific account of eclipses, meteors, rainbows, and the sun, which he described as a mass ...


6

The original astronomic concepts were that planets, stars, and the sun were small, close light sources. Being in heaven, they were perfect (aside from the moon, which was smudged due to closeness to this imperfect sphere). They were embedded in clear solid domes at varying distances. But in general, the idea that the heavens were made for us on Earth to ...


6

According to the main authoritiy on ancient astronomy and astrology, Otto Neugebauer, astrology was introduced to Hellenistic world from Babylon. (If you not know who he is, look at this Wikipedia article http://en.wikipedia.org/wiki/Otto_Neugebauer). Here is what he writes on Egypt in general: Egypt provides us with the exceptional case of a highly ...


6

The solstice was determined by observing the shade of the gnomon (a vertical stick on a level ground). Indeed, this is difficult to observe with a good precision. However, if you do this for many years, you obtain a better and better result. For example, suppose that your error is E, and you observe for N years. This gives you the length of the year (the ...



Only top voted, non community-wiki answers of a minimum length are eligible