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perihelions12/09/20241 replyview on HN

Not really,

https://en.wikipedia.org/wiki/Orders_of_magnitude_(speed)

440 km/s—"Typical speed of the stepped leader of lightning (cf. return stroke below).[31]"

445 km/s—"Max velocity of the remaining shell (mass about 0.1 mg) of an inertial confinement fusion capsule driven by the National Ignition Facility for the 'Bigfoot' capsule campaign.[32] Current fastest macroscopic human-made system."

1,000 km/s—"Typical speed of a Moreton wave across the surface of the Sun."


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GuB-4212/09/2024

> 440 km/s—"Typical speed of the stepped leader of lightning (cf. return stroke below).[31]"

Good one, I didn't think about that one. It means that galaxies are travelling lightning fast, literally.