The establishment of the festival was initiated by President VÃ¡clav Havel, who opened Prague Castle to artists at the beginning of the 1990s in order to attract the public. The first performance of Shakespeare took place here in 1990 and the festival has been held here regularly since 1998.
1 A black dwarf is a white dwarf that has cooled sufficiently such that it no longer emits any visible light. 2  A brown dwarf is a substellar object not massive enough to ever fuse hydrogen into helium, but still massive enough to fuse deuterium âless than about 0.08 solar masses and more than about 13 Jupiter masses.
A white dwarf is a star that has exhausted most of its fuel. White dwarfs are one of the densest forms of matter, being 200,000 times as dense as the earth. They are formed from small to medium-sized stars. very few white dwarfs, formed from larger stars, have atmospheres that are rich in oxygen. These white dwarfs have burned the carbon they once contained and the oxygen in their atmosphere is what remains of their cores.