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Cake day: August 24th, 2023

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  • What’s more likely to happen is Starship’s will be launched where the entire ship becomes the telescope, and then we’ll have arrays of these much further away.

    Not sure if it’s the same for radio, but for optical that means we can get a 9 meter mirror up there without any expensive folding mechanism, and who knows how big if we fold them as the fairing is not only wider but also longer.

    Cost would go from billions to hundreds of millions or less. James Webb cost 10b.

    The James Webb folding mirror is 6.5m and was folded into a 4.5m fairing…
















  • Sinai in the Yom-Kippur

    I think that seems reasonable fair to count?

    Edit: US Gov was convinced in '75 but that’s only by the point they were convinced, and its quite possible it was prior.

    Edit: just reading more, but this was a pretty cool event from the war

    The Egyptian Army put great effort into finding a quick and effective way of breaching the Israeli defenses. The Israelis had built large 18-metre (59 foot) high sand walls with a 60-degree slope and reinforced with concrete at the water line. Egyptian engineers initially experimented with explosive charges and bulldozers to clear the obstacles, before a junior officer proposed using high pressure water cannons. The idea was tested and found to be a sound one, and several high pressure water cannons were imported from Britain and East Germany. The water cannons effectively breached the sand walls using water from the canal.