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14 March 2015

14.03.2015

1.836 MHz

Opera





Aurora 
Taken by Timo Newton-Syms on March 13, 2015 @ Ruka, Finland





by JASON MAJOR on MARCH 10, 2015

“Color” radio image of galactic cluster Abell 2256. Credit: Owen et al., NRAO/AUI/NSF.

Even though it’s said that the average human eye can discern from seven to ten million different values and hues of colors, in reality our eyes are sensitive to only a very small section of the entire electromagnetic spectrum, corresponding to wavelengths in the range of 400 to 700 nanometers. Above and below those ranges lie enormously diverse segments of the EM spectrum, from minuscule yet powerful gamma rays to incredibly long, low-frequency radio waves.

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