The ultimate Sun-block

David Jones

Nature, 1997, vol. 390, issue 6659, 450-450

Abstract: This week Daedalus wonders how to make an artificial solar eclipse, and concludes that it should be possible to do so by obscuring the Sun with a high-flying circular shutter. His ‘Eclipsat’ will orbit the Earth at a height of 1,000 km, producing a solar eclipse every 105 minutes along a track 5 km across and up to 8,000 km wide. It should also be able to generate an ‘anti-eclipse’, reflecting the Sun down onto a narrow track on the dark side of the Earth.

Date: 1997
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DOI: 10.1038/37247

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