by Jim Mash
Last Updated 18/04/2021
Fluid Energy Theory
An entirely new theory based upon energy being a real substance

Olbers’ paradox

Current theories   FET

Olbers’ paradox is often quoted as being consistent with the big bang theory because it is a proposition claiming that since the sky at night is dark the universe must have a finite size and finite age. It is argued that every line of sight must end upon a star. Although the light from a star decreases with distance according to the inverse square law, the number of stars increases with distance and the two cancel out. So in an infinite universe with an infinite number of stars there must be the same amount of light shining upon every portion of the Earth. From this it is argued that the whole surface of the Earth should be as hot as the surface of a star.

Olbers’ paradox has been argued over by numerous eminent scientists and they all seem to agree that if the universe was eternal and extended to infinity then both the night and day skies should be as bright as the surface of the Sun. They argue that the big bang theory explains the paradox and that there are three reasons that the night sky is dark.

The first is the universe is finite in size and that there are therefore not an infinite number of stars.

The second is that because the universe is less than 14 billion years old there cannot be light coming from stars older than this.

The third reason is because the universe is expanding the light is stretched and somehow this causes it to lose energy so that by the time the light from distant stars reaches us it has lost all of its energy.


Olbers’ paradox would appear to rule out FET which predicts an eternal and infinite universe. However, you do not need FET to explain why the night sky must be darker than the day sky but just a bit of common sense. If we take away our Sun for the moment and assume that the universe is uniform on the very large scale we can see that there is the same amount of starlight shining down on both sides of the Earth. If we now replace the Sun in its proper position we see that its light only shines on the day side of the Earth.

Because the nearest star to us is around 200,000 times further away than the Sun the amount of light shining on the day lit side of the Earth is always 4x1010 times greater than that on the night side, neglecting any reflection from the Moon.

However, the reason why we can have a universe that is infinite in extent and time does need explaining by FET.

The reason that the light from all the stars in an infinite universe do not make much contribution to the total amount of visible light shining on both sides of the planet is that light loses energy as it travels through space as explained in FET as a real loss of energy and not just a stretching of a wavelength by expanding space.

Therefore the radiation from stars further away than 1011 light years has either disappeared back into the continuum or dropped below the visible region of the spectrum before it reaches us. Hence it does not matter how many stars are beyond this limit.

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