Earth前面为什么不用The

Earth前面为什么不用The The sun is the closest star to Earth.为什么sun前面用the,earth前不用冠词? earth前面加the吗? The earth goes around the sun just as the moon around the earth.不用翻译了,说明一下为什么不用just like mars前面为什么不加the而earth和moon的前面确加the呢 是Mars是专有名词 而earth和 moon不是吗 earth的前面能不能加定冠词the? Earth前面一定加the吗 earth前面什么时候不加the what is the biggest animal on the earth 为什么不用which which is bigger,the sun or the earth?为什么用or而不用and? 什么是专有名词太阳sun 月亮moon 地球earth 是不是专有名词,为什么前面还要加the it is best to 的best前面为什么不用the? 为什么same前面要加the而different前不用 为什么太阳系的英文中,the sun,the moon.the Earth要加the,其他行星不用,the Earth要大写 the earth moves round the sun,not the other way aroundthe earth moves round the sun,not ___________.为什么用“the other way around不用another way round There will be more people living on the earth.这里用living 而不用live,为什么? the sun the moon the earth ,the stars,and the space _____them为什么选between不用among The earth turns itself from the west to the east.这句那些词用错了?为什么不用加the?