Simplify the following text for a Grade 10 native English-speaking person.
Original: From the first appearance of Ca-Al-rich inclusions ( the first solid matter in the Solar System , forming about 4567 million years ago ) , a likely timeline is as follows :
Simplified: From the first appearance of Ca-Al-rich inclusions ( the first solid matter in the Solar System , forming about 4,567 million years ago ) , a likely time line is as follows :