Expanding Universe: Big Bang & Beyond

In summary, the conversation discusses the idea of space expansion after the big bang and why atoms, stars, and galaxies are not affected by it. It also mentions a previous thread that addresses this topic.
  • #1
apurvmj
26
0
Hi all,
After the 'big bang' it is said that space is expanding. Atom is almost 99% space then why are they not expanding, same can go with all the stars and galaxies and all stuffs.
Hope this is not sounding crazy. If so pls forgive me.
Cheers.
 
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  • #3
The OP question is already addressed in other threads, so this thread is closed.
 

FAQ: Expanding Universe: Big Bang & Beyond

1. What is the Big Bang Theory?

The Big Bang Theory is the scientific explanation for the origin of the universe. It proposes that the universe began as a single, extremely dense and hot point, and has been expanding and cooling ever since.

2. How do we know the universe is expanding?

Scientists have observed that the light from distant galaxies is redshifted, meaning that the wavelengths of light are stretched out as they travel through space. This is evidence that the universe is expanding and the galaxies are moving away from each other.

3. What is dark energy and how does it affect the expansion of the universe?

Dark energy is a mysterious force that is believed to be causing the expansion of the universe to accelerate. It makes up about 70% of the total energy in the universe, but its exact nature is still unknown.

4. What is the cosmic microwave background radiation?

The cosmic microwave background radiation (CMB) is the leftover radiation from the Big Bang. It is a faint glow that fills the entire universe and is the oldest light in the universe. Studying the CMB has provided scientists with important clues about the early universe.

5. What does the future hold for the expanding universe?

Based on current observations and theories, it is predicted that the expansion of the universe will continue to accelerate. This means that the galaxies will continue to move away from each other at an increasing rate, and the universe will continue to grow larger and colder.

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