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First of all, We should identify three concepts to understand this idea.

What is the difference between black, dark, void, and empty?

• 🔲 Black (Color): According to scientists , black exists because of human perception by his eyes. When our eyes see an object that absorbs all light wavelengths or specifically does not reflect light we perceive it as black.
• 🌑 Dark: Defined as a place with no light or a very small amount of light, making it difficult or impossible to see objects.
• 🆚 Black vs. Dark: For example, if you were in a room and closed all sources of light, then it’s dark. But if you turn on a lamp and have a book that does not reflect any light or specifically absorbs it then the book is black.
• 📭 Empty: Empty means there is nothing visible in a place, but it may still contain air, light, microorganisms, etc. For example, if I looked into a room and found nothing, it is empty, but it still contains air, light, and microscopic life.

In Conclusion🌌:

Space looks black to us, but in reality, it's dark. The amount of emitted light, in comparison to the huge size of our universe, makes it very dark like a very, very, very small light in a huge room.
But is space empty or a void? Not completely. Space is a near-perfect vacuum, but not an absolute void. It still contains particles, cosmic radiation, and even dark matter. While it's almost a void, it's never truly empty. 🚀✨

ok ok so, why space is so dark scientifically 🧐 ?

First of all we must understand that the space is physical nature and laws is way diffrenet than that in earth 🌍 i will discuss in some points :
1️⃣ No Atmosphere to Scatter Light:
On Earth 🌎 , the sky is blue because sunlight interacts with air molecules, scattering shorter blue wavelengths in all directions (Rayleigh scattering).
In space, there is no atmosphere, so light travels in straight lines without scattering. That means unless you're looking directly at a light source (like the Sun or a star), there’s nothing to illuminate the surrounding space.
2️⃣ Light ⚡ Spreads Out in an Expanding Universe:
The universe is really huge light from stars and galaxies spreads over vast distances.
The further away a light source is, the more its brightness decreases, making space appear dark in most directions.
3️⃣ The Cosmic ☄️ Background Radiation Is Mostly Invisible:
The Cosmic Microwave Background (CMB) is the leftover radiation from the Big Bang, but it exists in the microwave range, which is invisible to the human eye.
If our eyes could detect microwaves, space would glow faintly instead of appearing black.
4️⃣ Olbers' Paradox🌌❓🔄: Why Isn’t the Night Sky Bright?
If the universe were infinite and filled with stars, every direction should eventually hit a star, making the sky bright everywhere.
But because the universe is finite in age (13.8 billion years old) and expanding, we can only see light from a limited number of stars.
Many distant stars’ light hasn’t had enough time to reach us yet, leaving much of space dark.

"So, in the end, if the universe is filled with countless stars, why does the night remain so dark? And if space holds so much, can we ever call it truly empty?" 🌌❓🔄🤔

I’d love to hear your opinions do you think space is more void or more full? Let’s discuss!" 📩
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