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While only polar explorers and the most barefoot sailors use the sun for manual navigation these days, we are still dependant on our parent star for satellite navigation. Image from Antarctica, ExWeb files.

2008: blank sun could mark calm before the storm in space weather forecast

Posted: Oct 14, 2008 01:58 am EDT

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A Greek once claimed that all the earth's oceans are connected. He insisted that Africa can be circumnavigated and that India can be reached by sailing westward from Spain. He stated that the earth is round and he even calculated its diameter to within an error of fifty miles. The big deal? Eratosthenes proposed all this around 200 BC, or almost 2000 years before Columbus voyage.With the current series from HET; this Columbus day we continue the focus on expedition technology - and an aspect that was equally important to...

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