Friday, July 17, 2026

What's It Like to Travel Near the Speed of Light? Part 4: The Hot View

A Saturn V rocket accelerates off the pad. Sustained acceleration is exactly what conjures the faint quantum glow of Unruh radiation. Credit: NASA (public domain).

An accelerating observer finds their empty vacuum glowing with real particles, a bizarre effect called Unruh radiation. It's a cousin to Hawking radiation, but with no black hole required, just a rocket and its throttle.



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