<Table> <Tr> <Td> </Td> </Tr> <Tr> <Td> Earth's atmosphere backlit by the Sun in an eclipse observed from deep space onboard Apollo 12 in 1969 . </Td> </Tr> </Table> <Tr> <Td> Earth's atmosphere backlit by the Sun in an eclipse observed from deep space onboard Apollo 12 in 1969 . </Td> </Tr>

Which layer technically isn't part of earth's atmosphere