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

July 17, 2026 Universe Today

What's It Like to Travel Near the Speed of Light? Part 4: The Hot View
By Paul Sutter (https://ift.tt/JKNqcb8)

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.

July 18, 2026 at 01:10AM
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