There are billions of stars in our universe,the Sun is one of them and it is the closest star to us.The Sun is the star of the Solar System.The Solar System consists of the Sun and the astronomical objects gravitationally bound in orbit around it.There are eight planets in solar system.The Earth is one of the four smaller inner planets,aslo know as terrestrial planets.The four outer planets,Jupiter,Saturn,Uranus and Neptune are gas giants.The Moon is the only natural satellite of the Earth and the fifth largest satellite in the Solar System.
急用!好的快的有加!太阳,月亮,星星,地球之间的关系用英语表达.