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Helios2 was half that speed in 1976

I guess everything with a sun slingshot is going to be impressive.

We'd have 1% speed-of-causality probes by now if it meant better war machines but best they can do with the budget

Vaguely related they did capture light moving with a 1 billion frames per second experiment so Femtosecond Photography is definitely some cutting edge stuff.



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