What are gravitational waves? - Amber L. Stuver
Check out all of TED-Ed's book recommendations: http://ed.ted.com/books Check out Neil deGrasse Tyson's "Astrophysics for People in a Hurry": https://shop.ed.ted.com/collections/ted-ed-book-recomm...
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At about six o'clock in the morning on September 14, 2015, scientists witnessed something no human had ever seen: two black holes colliding. Both about 30 times as massive as our Sun, they had been orbiting each other for millions of years. As they got closer together, they circled each other faster and faster. Finally, they collided and merged into a single, even bigger, black hole. A fraction of a second before their crash, they sent a vibration across the universe at the speed of light. And on Earth, billions of years later, a detector called the Laser Interferometer Gravitational Wave Observatory, or LIGO for short, picked it up. The signal only lasted a fifth of a second and was the detector's first observation of gravitational wave...
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At about six o'clock in the morning on September 14, 2015, scientists witnessed something no human had ever seen: two black holes colliding. Both about 30 times as massive as our Sun, they had been orbiting each other for millions of years. As they got closer together, they circled each other faster and faster. Finally, they collided and merged into a single, even bigger, black hole. A fraction of a second before their crash, they sent a vibration across the universe at the speed of light. And on Earth, billions of years later, a detector called the Laser Interferometer Gravitational Wave Observatory, or LIGO for short, picked it up. The signal only lasted a fifth of a second and was the detector's first observation of gravitational wave...
