If the sun is in space why is space dark? Because space is a vacuum!
Other than planets, moons, and asteroids being millions of kilometers farther from each other, space doesn’t have any object that can scatter and reflect the light to our eyes.
Thus, with no light detection by our eyes, the entire space seems black to us.
However, do you think this could be the only reason for explaining such broad phenomena? Of course, it isn’t. So,
Let’s take a deeper look at it:
If the sun is in space, why is the space dark? The reason can be explained in just two words; Lack of atmosphere.
By lack of atmosphere, we mean that the space is nearly a perfect vacuum having exceedingly few particles and objects to reflect the light.
And, of course, we all know that to perceive brightness, two things are needed - light and something to reflect the light.
If the sun is in space why is space dark?
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Although space does have light, being a perfect vacuum, it doesn’t have any particle or object between the stars and the planets that can bring it back to our eyes.
Therefore, in space, the light travels in a direct straight line from the source (Stars) to the receiver (earth), and the entire space seems dark to us.
The darkness of space can be further explained by Olber’s Paradox (a term used in Physics and Astronomy).
It tells that the universe is enlarging more rapidly than the speed of light; therefore, the light coming from distant sources like stars and galaxies might be stretching and turning into larger wavelengths like infrared waves, microwaves, or radio waves that can’t be sensed by the human eyes, therefore, the entire space appears dark to the naked eyes.
Conclusion
In a nutshell, this phenomenon can be justified by the fact that space, having almost a negligible medium, is devoid of all the basics that are needed for the scattering and reflection of light.