<P> These expressions for the obliquity are intended for high precision over a relatively short time span, perhaps ± several centuries . J. Laskar computed an expression to order T good to 0". 04 / 1000 years over 10,000 years . </P> <P> All of these expressions are for the mean obliquity, that is, without the nutation of the equator included . The true or instantaneous obliquity includes the nutation . </P> <Table> <Tr> <Td> </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td_colspan="2"> Top and side views of the plane of the ecliptic, showing planets Mercury, Venus, Earth, and Mars . Most of the planets orbit the Sun very nearly in the same plane in which Earth orbits, the ecliptic . </Td> <Td_colspan="1"> Four planets lined up along the ecliptic in July 2010, illustrating how the planets orbit the Sun in nearly the same plane . Photo taken at sunset, looking west over Surakarta, Java, Indonesia . </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> </Td> <Td> </Td> </Tr>

Which of the following lies in the ecliptic plane