How all the stuff in the solar system was created

1. How all the stuff in the solar system was created

2. Step 1: Nebula forced out of balance by nearby supernova (probably) • Step 2: Solar nebula forms, gravity pulls lighter elements toward center forming a protostar. 

3. Step 3: Protoplanetary disk, or accretion disk, flattens out due to rotation of protostar.

4. Step 4: Heavier elements stay close to sun and coalesce to form planetessimals, from gravity and heat from collisions. • Terrestrial planets form when gravity makes planetessimal round • Leftover heavy material forms asteroid belt.

5. Step 5: Sun’s fusion creates solar wind, which blows lighter elements (mostly hydrogen and helium) to outer solar system, creating four large “outer planets.” • Sun’s energy doesn’t allow inner planets to be icy or gassy. • Leftover, distant icy material forms the Oort cloud.

6. Formation of gas giant

7. The Oortcloud is spherical, while all else is flat. • It is the birthplace of comets

8. Distances and shapes of our solar system

9. What parts of the solar system will continue to change?