Home » light-years

What is Time? – Time and space in Physics

By |2018-05-31T11:49:26+00:00August 19th, 2017|Physics, When|

Time and space: a sundial from Ukraine (ca. 1300 BC) - one of the two oldest sundials in the world Are time and space the same thing? Nobody knows what time is, or how it works. Time seems to be closely related to space, and it's possible that space and time are different ways [...]

Who was Archimedes? Eureka!

By |2019-02-01T06:23:28+00:00July 18th, 2017|History|

Archimedes was from Syracuse, Sicily. Here you see it with Mount Etna in the background When did Archimedes live? Archimedes was born about 287 BC, so he was a little younger than Euclid. Archimedes' father was an astronomer, so he grew up knowing a lot about science and math. Who was Euclid? Greek astronomy History [...]

Ancient Greek astronomy

By |2018-04-23T14:17:22+00:00July 18th, 2017|Greeks, Science|

Eclipse of the sun The art of astrology, the study of the stars in order to predict future events, and to interpret people's characters, was already very advanced before the Greeks began to interest themselves in the stars. The Egyptians and especially the Mesopotamians had done a lot of scientific observations and had named the constellations of stars, and [...]