This review concerns the formation of bodies of the Solar System .
Three major changes in our understanding of the early history of the Solar System are presented .

1 ) Early differentiation : A few recent results support the idea that protoplanet formation and differentiation occurred partly simultaneously than CAI formation ( which is generally accepted as time 0 of the Solar System ) .
First , some iron meteorites , eucrites , and angrites older than the chondrules or even than the CAI have been found .
Second , iron meteorites could be debris of early disrupted differentiated planetesimals , scattered from the terrestrial planet region to the Main Belt .
Finally , chondrules contain fragments of planetesimal material .

2 ) Earth and Moon : An equilibration mechanism explains the identical Oxygen isotopic composition of the Earth and the Moon .
In addition , it has been shown that the Earth and the Moon mantles have the same ^ { 182 } W anomaly , in contrast to what was believed before .
Consequently , the Moon forming impact should have occurred after the extinction of the ^ { 182 } Hf radioactivity , about 60 Myr after Solar System formation .
This new datation is in agreement with new N-body numerical simulations of the last phase of terrestrial planets formation , in which giant impacts occur during about 100 Myr .

3 ) Giant planets and Nice model : The migration of the giant planets in the protoplanetary disc can be prevented if the planets are in resonance , close to each other .
In 2005 , Tsiganis , Gomes , Morbidelli , and Levison have proposed a model in which the 4 outer planets of the Solar System were in a compact configuration after the dissipation of gaseous disc .
A few hundred million years later , a global instability drives the planets on their present orbits , producing the Late Heavy Bombardment .
In the frame of this so called ‘ ‘ Nice-model ’ ’ , a lot of characteristics of our Solar System can be explained ( distribution of the Trojans and Hildas asteroids , Kuiper belt structure , irregular satellites of the giant planets… ) .