What is Time? – Time and space in Physics
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 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 [...]
Lyrid meteor shower - Space Most of the universe is just emptiness - there is nothing there at all. It's dark. That's space. But within the space there is a [...]
Light takes years to reach us from these stars far away in space. What is a light-year? A light-year is the distance that light can travel in one year - [...]
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 [...]
Greek astronomy: Eclipse of the sun Astronomy before the Greeks The art of astronomy was already very advanced before the Greeks began to interest themselves in the stars. The Egyptians and especially [...]