The paper states that as gas spirals toward a black hole through a formation called an accretion disk, it heats up to roughly 10 million degrees Celsius. The temperature in the main body of the disk is roughly 2,000 times hotter than the sun and emits low-energy or "soft" X-rays. However, observations also detect "hard" X-rays which produce up to 100 times higher energy levels.
Daredevils are not the only ones using bridges for fun: musicians are getting in on the act too. Di Mainstone and her team at Queen Mary University of London are attaching people clad in a special body suit to architectural structures with strings that tap into a building's vibrations and can be played like an electronic harp.
Mainstone was inspired by the Brooklyn Bridge while living in New York. "I wondered whether there was a way to capture the vibrations that go through cables triggered by walking, traffic and wind," she says. Since the vibrations aren't audible, they need to be transformed into a form we can hear.