Posts Tagged "drawing"
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Sextant: data and historical old ship GPS navigation
Continuing from our last post on models of historic civilizations and data, we’re drawing a line from Carl Sagan to the Conquistadors (and modern TV documentaries’ theories about them). This historic photo is an antique sextant from 1890. This historical navigation device worked by measuring the angle between the sun (or stars) and horizon using two mirrors. It was the GPS (or Apple Maps) of its day. And, as we learned from Apple Map’s initial glitches, then as now, successful navigation required a lot of information (or data) to work correctly! Since the Internet didn’t exist, this data had to arrive by some other means, which we’ll talk about in a future post. (So we’re also continuing on our earlier mirror theme.) The use of two mirrors’ reflection to align the image of the object with the horizon (when the sextant was set at the correct angle) enabled accurate measurements when on a moving platform, such as by a sailor on a boat at sea.… Read the restPhoto of Earth by Nasa? Nope. Astroengineering.
Is this a photo of Earth by Nasa? Nope. In this artist’s conception, the Moon is geoengineered/astroengineering by an advanced civilization to be more like Earth. Will inducing artificial earthquakes through geoengineering or someday save lives, or is it too dangerous? Will we someday geoengineer the and the stars, as discussed on recent science documentaries? These were discussed in our earlier blog post on fracking and geoengineering, for which this was the featured image. Photo Credit: Daein Ballard/WikiMedia/CC-BY-SA-3 Post and some comments below may be synced from our original Instagram version. Instagram likes: (more…)… Read the restRecent Posts
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