How did the earth form? – Einsteinium Zone

Question: How did the earth form?
- Keywords:
  earth
Asked by anon-190973 to Kathryn, Graeme, Chris, Anne, Agnes, Adam on 12 Nov 2018.
- Agnes Wojtusiak answered on 12 Nov 2018:
  
  From space dust!
  .
  After the Big Bang, particles went flying everywhere. Some got closer together and started to hang out. The more there were in a group, the more wanted to join (because of their stronger joint gravitational pull). That formed clouds of dust called a “solar nebula”. Some of those particles got even closer together, and formed the Sun! The remaining dust also started to lump into smaller groups – one of those became the Earth.
- Anne Green answered on 12 Nov 2018:
  
  This isn’t my area of expertise. Graeme or Kathryn are possibly better qualified to answer this one than me.
- Graeme Poole answered on 12 Nov 2018:
  
  4560 million years ago, the solar system formed as a disk of debris around the new born Sun. Particles in the disk stuck together and collided with nearby particles, forming grains. These grains then collided with other grains, growing bigger in size. This continued for millions of years, eventually forming planets sized object, like the Earth.
- Adam McGuinness answered on 12 Nov 2018:
  
  Some great answers from the other scientists there!
- Kathryn answered on 12 Nov 2018:
  
  The others have given some great answers here and got here before I did.

Question: How did the earth form?