News Todays 1

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🌌 1. Observable Universe (What We Can See)

📏 Diameter:

About 93 billion light-years

• That means light from the farthest galaxies we can detect has taken 13.8 billion years to reach us.
• But due to expansion of space, those galaxies are now ~46.5 billion light-years away in all directions.
• So the full observable universe spans a 93-billion light-year diameter.

🧠 Imagine: You’re looking at galaxies that are so far away, you’re seeing them as they were just after the Big Bang.

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🌠 2. Entire Universe (Including Beyond What We Can See)

We don’t know its true size.

But most cosmologists believe:

• The entire universe is much larger than the observable part.
• It might be infinite in size — or at least 250 times bigger than what we can observe.

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🔭 Why Can’t We See It All?

• Because light takes time to travel.
• The universe is only 13.8 billion years old.
• So we can only see objects whose light has had time to reach us.

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🌐 Universe Expansion & Growth

• The universe is expanding — galaxies are moving away from us.
• Space itself is stretching, making distant objects move faster (even faster than light — relativity allows this because it’s space that’s expanding).

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📌 Summary

Type	Size Estimate
Observable Universe	~93 billion light-years across
Entire Universe	Possibly infinite

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