Explore the history of gravitational waves, from Albert Einstein's 1916 equations to the 2015 discovery of ripples in spacetime by massive detectors.
Einstein’s theory tells you that the stage is actually a participant. It can stretch, it can squeeze, and it can carry information across the cosmos.
Einstein's theory of general relativity and his predictions regarding gravitational waves, covering the theoretical foundation and how these ripples in spacetime were hypothesized before discovery.
The ghostly ripples refer to gravitational waves, which are vibrations in the fabric of spacetime. First predicted by Albert Einstein in 1916 through his work on general relativity, these waves were described as space wobbling like a bowl of jelly. Though they were once considered mathematical ghosts, they represent physical ripples that travel across the universe, carrying information about massive cosmic events.
Gravitational waves were directly detected on September 14, 2015, by two massive detectors located in Louisiana and Washington state. These instruments felt a vibration smaller than the width of an atomic nucleus. This tiny shudder was the first physical evidence of ripples that had traveled over a billion light years, confirming a major milestone in physics history and scientific discovery.
No, Albert Einstein had a complicated relationship with his own prediction. While he initially proposed them in 1916, he spent decades in a tug of war between his intuition and his math. At various points, he even wrote papers claiming gravitational waves were an illusion caused by coordinate choices. This highlights the messy, human process behind one of the most famous theories in general relativity.
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![[1610.08803] A brief history of gravitational wave research](https://d1y2du6z1jfm9e.cloudfront.net/assets/podcast/yellow.png)
![[1607.04202] Chapter 0 Theory of Gravitational Waves](https://d1y2du6z1jfm9e.cloudfront.net/assets/podcast/blue.png)
