When studying navigational instruments, the sextant appears quite early on.Unlike electronic devices such as radar, GPS, or ECDIS, it has the appearance of a truly "old-fashioned navigational ...

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An old seafaring instrument could help astronauts on ever more far-flung and perilous missions.

Last time, I talked about how a sextant is a nautical instrument that measures the angle between two directions, such as a celestial body and the horizon.So, why exactly can a sextant measure angles ...

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Over the course of a decade, the Apollo program (in addition to landing humans on the Moon six times!) produced an incredible array of technical breakthroughs and achievements. But many people do not ...