Ancient Greek dialects by the grammarians under the terms 'lexeis' or 'glôssai'. The dialects of Classical Antiquity are grouped slightly differently by various authorities. Pamphylian is a marginal dialect of Asia Minor and is sometimes left uncategorized. Mycenaean was deciphered only in 1952 and so is missing from the earlier schemes presented here: The Ancient Greek dialects differed mainly in vowels. Loss of intervocalic "s" and consonantal "i" and "w" from Proto-Greek brought two vowels together in hiatus, a circumstance often called a "collision of vowels". Over time, Greek speakers would change pronunciation to avoid such a collision, and the way that vowels
Ancient Greek astronomy find remarkable information such as that the Earth is round, it has an axis and it moves around it in one day, it has three climate zones and that the Sun magnetizes the Stars and planets. The name "planet" comes from the Greek term πλανήτης ("planētēs"), meaning "wanderer", as ancient astronomers noted how certain lights moved across the sky in relation to the other stars. Five planets can be seen with the naked eye: Mercury, Venus, Mars, Jupiter, and Saturn, the Greek names being Hermes, Aphrodite, Ares, Zeus and Cronus. Sometimes the luminaries, the Sun and Moon, are added to