US authorities investigate crypto exchange FTX

The swift collapse of cryptocurrency exchange FTX sent more shockwaves through the crypto world on Thursday, with authorities now investigating the firm for potential securities violations and analysts bracing for a further ...

Computer Sciences

Neural network analyzes gravitational waves in real time

Black holes are one of the greatest mysteries of the universe—for example, a black hole with the mass of our sun has a radius of only 3 kilometers. Black holes in orbit around each other emit gravitational radiation—oscillations ...


The internet is rotting: Thousands of sites go offline each year

I have just taken an entire website and gigabytes of data offline. It covered a highly successful series of conferences on the data economy. It brought together thought leaders and key decision-makers from around the world ...

Black hole

In general relativity, a black hole is a region of space in which the gravitational field is so powerful that nothing, including light, can escape its pull. The black hole has a one-way surface, called an event horizon, into which objects can fall, but out of which nothing can come. It is called "black" because it absorbs all the light that hits it, reflecting nothing, just like a perfect blackbody in thermodynamics. Quantum analysis of black holes shows them to possess a temperature and Hawking radiation.

Despite its invisible interior, a black hole can reveal its presence through interaction with other matter. A black hole can be inferred by tracking the movement of a group of stars that orbit a region in space which looks empty. Alternatively, one can see gas falling into a relatively small black hole, from a companion star. This gas spirals inward, heating up to very high temperature and emitting large amounts of radiation that can be detected from earthbound and earth-orbiting telescopes. Such observations have resulted in the scientific consensus that, barring a breakdown in our understanding of nature, black holes do exist in our universe.

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