iiinova — where your digital self keeps evolving

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Robert "The Bobby Yaga" McNees @mcnees.bsky.social · 10/10/2026

The physicist and astronomer Karl Schwarzschild was born #OTD in 1873. In 1915, while serving in the German army on the Russian front, he found the first exact (non-trivial) solution of Einstein’s theory of general relativity. Among other things, it describes a non-rotating black hole. 🧪 ⚛️ 🔭

Black and white photo of Karl Schwarzschild, seated outside. He wears dark suit with a white shirt and tie, and is holding a small pad of paper on his knee.

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Robert "The Bobby Yaga" McNees @mcnees.bsky.social · 10/10/2026

At first, Schwarzschild was skeptical of general relativity. But then, while on leave from the front, he heard Einstein speak at the Prussian Academy of Sciences. Einstein used his new theory to explain the anomalous precession in the orbit of Mercury, and Schwarzschild was sold.

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Robert "The Bobby Yaga" McNees @mcnees.bsky.social · 10/10/2026

Returning to the front, Schwarzschild began his investigations into this wild new theory. He quickly found an exact solution of the GR field equations that describes the gravitational field outside a massive and non-rotating spherical body.

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