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Nobelpreisträger Ginzburg

The HOU conference was very lucky that Mr. Ginzburg, one of the most famous physicists still alive, met their invitation to Munich. The subject of his speech was the 'Development of Astronomy from ancient time till present'. Mr. Ginzburg started with an explanation of Keplers significance in the change from geocentral to heliocentral worldview. Kepler himself tought that stars were fixed and motionless. This view of the universe changed with Galileos discovery of the Jupiter moons and Newtons combination of both ideas (about 300 years later). A theme Mr. Ginzburg showed special interest in was 'Black Holes'. What are Black Holes and how do you observe them? A black hole is a concentrated, rotating mass with a strong gravitational field, come into being by a collapsed sun. So how do you know if there is a black hole? There are some possibilities: if you encounter a star which behaves like a double star the reason therfore might be a black hole rotating nearby. Another idea Mr.Ginzburg was interested in was the develpoment of the universe starting with 'Big Bang' and the question if it extends or contracts. In 1923 Friedmann (Russian physics) found out that the idea of a stational universe is impossible because the gravitational force would contract it. That's how the idea of an extending universe (as a countereffect to gravitation) develloped. 'Dark Matter' also gave an incentive to further discussions.

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