<P> Studies of discs around other stars have also done much to establish a time frame for Solar System formation . Stars between one and three million years old have discs rich in gas, whereas discs around stars more than 10 million years old have little to no gas, suggesting that giant planets within them have ceased forming . </P> <Table> <Tr> <Td> </Td> <Td> A graphical timeline is available at Graphical timeline of Earth and Sun </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> A graphical timeline is available at Graphical timeline of Earth and Sun </Td> </Tr> <P> Note: All dates and times in this chronology are approximate and should be taken as an order of magnitude indicator only . </P>

Where do all the elements in our solar system come from