White Holes: Inside the Horizon Exhibition_The Van de Veldes a special Anglo-Dutch flag designed

a special Anglo-Dutch flag designed for this occasion

A chart showing the track of the Spanish Armada

In this Hubble Palette version the hydrogen-alpha is mapped to green

Time is a mystery that does not cease to puzzle us

Each stamp honours one of the four prototypes that prize-winning clockmaker John Harrison invented to solve the problem of finding longitude at sea

White Holes: Inside the Horizon Exhibition_The Van de Veldes a special Anglo-Dutch flag designedLet us journey into the heart of a black hole. Let us slip beyond its boundary, the horizon, and tumble on and on down this crack in the universe. As we plunge, we'll see geometry fold, and we'll feel the equations draw tight around us. Eventually, we'll pass it: the remains of a star, deep, dense, and falling further away. And thenthe bottom. Where time and space end, and the white hole is born . . .