2-3 The Big Bang Theory v2

Put the pictures in order that they happened from first event to last event.

1. 

   A young star forms.

2. 

   A nebula collapses and rotates.

3. 

   A flare up from a young star blasts hydrogen and helium gases outward.

4. 

   A nebula "pancakes" with central bulge.

5. 

   A swirling nebula forms from the materials left behind by a supernova.

6. 

   Inner Planets and Gas Giant Planets round into form.

7. 

   Two ring-like layers form: a solid ring close in and a gas layer further out.