Tangerang Guidelines – If the sky is blue, why outer space black? Isn’t it many scattered stars?
This question has not been answered by scientists for years. Even according to the NASA website, scientists such as Johannes Kepler, Edmond Halley, and German doctor and astronomer Wilhelm Olbers, have not been able to solve this mystery.
After years of searching, it turns out, this mystery has nothing to do with the number of stars in outer space.
“You might think that the billions of stars in the galaxy, the billions of galaxies in the universe and other objects, such as planets, that reflect light, can make outer space into light,” said Tenley Hutchinson-Smith, a graduate student in astronomy and astrophysics at the University of California, Santa Cruz (UCSC).
“On the contrary, outer space really really It’s dark,” he continued.
Smith said that the phenomenon called Olbers Paradox could be explained by the theory of expansion of space and time. This theory explains that our universe is expanding faster than the speed of light.
Galaxies stretch and transform into infrared waves, microwaves, and radio waves, which our human eyes cannot detect. As a result of not being detected, then outer space look It’s dark or black to the naked eye.
Another reason interstellar and interplanetary space appears It’s dark is due to the absence of molecules. On Earth, we have molecules that make up the atmosphere, including nitrogen and oxygen. These molecules spread many component of visible light with blue and purple wavelengths from the sun in all directions, including to our eyes.
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