Big Bang Theory

Question 1

What happened at “time zero”?

Answer 1

Before the big bang, there is no concept of time. The universe is infinitely small and infinitely hot. The forces that we know do not exist

Question 2

What happened 1 second after the big bang?

Answer 2

The first particles from. It is still incredibly hot, so the only particles that can exist are protons and neutrons.

Question 3

What happened 3 seconds after the big bang?

Answer 3

Protons and neutrons come together to form the nuclei of simple elements (Hydrogen, Helium and lithium)

Question 4

What happened 3-10,000 years after the big bang?

Answer 4

This is known as the radiation era of the universe. There is very little matter, and the universe is mostly full of high frequency electromagnetic radiation

Question 5

300,000 years after the big bang?

Answer 5

This is the beginning of the era of matter domination. The temperature is not low enough for electrons to bind with nuclei and from neutral atoms

Question 6

What happened 300m years after the big bang?

Answer 6

The first stars are born. Groups of these stars will go no to become the earliest galaxies.

Question 7

What happened approx. 10bn years after the big bang?

Answer 7

Our sun and the solar system that the Earth is in is born