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3 ore fa · A FEW days ago, via BBC Archives, a clip from the BBC’s early evening programme Nationwide in 1973 popped into my feed. It starts with a grey establishing shot (for some reason, footage of the 70s always seems grey) of a barge on the Thames before revealing David Niven, resplendent in a matching deep-collared shirt and tie – there are, perhaps, some things which are best left in the past.
3 ore fa · The Moon's south pole is also thought to contain abundant reserves of valuable rare minerals and plentiful supplies of helium-3, which is scarce on Earth and could provide almost limitless clean ...
1 giorno fa · Space-based solar power essentially consists of three elements: [2] collecting solar energy in space with reflectors or inflatable mirrors onto solar cells or heaters for thermal systems. wireless power transmission to Earth via microwave or laser. receiving power on Earth via a rectenna, a microwave antenna.
