![]() They do not arise from observations of the sky but from Einstein’s mathematical equations, which in his day served to predict the existence of black holes -something that took years and years to be confirmed by observation ( and much more time to be actually ‘seen’). We have no confirmation that one has ever been detected, and no candidate location for a white hole has even been identified in the sky. Kruskal–Szekeres diagram, illustrating the mathematical interpretation of relativity that predicts the theoretical existence of black holes (II) and white holes (IV). Perhaps the word hole is not the most appropriate term to define these objects, since they do the opposite of what we intuit a hole does. If nothing can get out of a black hole, the opposite is true for a white hole -nothing can get in- and it would require faster-than-light speed to penetrate the event horizon line, which is as close as we can get. ![]() Much less well known are white holes, which have the opposite properties. White holeīlack holes are undoubtedly one of the most popular objects in astronomy. ![]() Beneath that tranquil blanket of stars hide astronomical phenomena of unimaginable rarity and violence. Thousands of bright spots convey stillness and serenity, forming constellations that appear to move slowly and smoothly throughout the night. The contemplation of a starry sky is a relaxing experience.
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