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Take these colours out of the dress image, and it appears blue and black.
He explained that "air must have darkness beyond it, and hence it appears blue," and went on to say that "the Reader will not wonder if I make great jumps from one subject to another".
The manuscript contains his speculations on why the sky is blue ("Experience shows us," he wrote, "that air must have darkness beyond it and hence it appears blue") and why fossils can be found on mountaintops.
Seeing our home planet from afar, he wrote, prompted an epiphany: "The earth must become as it appears: blue and white, not capitalist or Communist; blue and white, not rich or poor; blue and white, not envious or envied".
So, in December 1968 Apollo 8 transmitted pictures of Earth from a lunar orbit and we could, the Apollo 11 astronaut Michael Collins later said, see 'an Earth as it appears: blue and white, not capitalist or Communist; blue and white, not rich or poor; blue and white, not envious or envied'.
It turns out our sky is violet, but it appears blue because of the way our eyes work.
Similar(53)
The composition of the spinel phase in the meteorite has been analyzed by means of an electron probe and found to be (Mg0.75Fe0.25)2Sin4; in thin sections it appears blue-gray to violet-blue.
However if it is deep enough, so that light cannot reflect off the sea floor, it appears dark blue.
The specimen was therefore first dyed with methylene blue making it appear dark blue.
The water is a murky brown it only appears blue because it reflects the desert sky.
Reds appear dark, and purpose appears blue.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com