(ORDO NEWS) — Spaces do not look black because there is not enough light. Tenley Hutchinson-Smith noted that the sky must be unusually bright, because there are a huge number of stars outside the Earth. In fact, this is not at all the case. This contradiction is called the Olbers photometric paradox. It can be explained using the theory of expansion of space and time.
It is reported by Live Science.
Due to the fact that the universe is expanding all the time, the light emitted by galaxies gradually goes into a range that cannot be noticed without special equipment. Scientists have noted that stars can emit light in a wide variety of colors. Even those that cannot be seen by the human eye.
Another reason that space appears black is because it is a near-perfect vacuum. People see the sky blue due to the fact that in the atmosphere light is scattered in absolutely all directions. In outer space, there is a minimal amount of particles that could scatter light. If the light does not reach human eyes, then only black will be visible.
At the same time, a new study this year made it possible to get unexpected results. Scientists have found that the background light of our universe is about twice as bright as previously thought. In the future, experts plan to study the reasons that provoke the appearance of additional brightness.
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