—Because he ____ Guangzhou.

    When we talked about the space, we know the universe means the earth, the sun, the moon, the stars and so on in space. Many of the stars are so far away that we can't see them.

    Through our geography lessons, we know the earth ①goes around the sun, and the moon goes around the earth.

    We have day and night because the earth keeps moving all the time. Just because the moon is closer to the earth than the sun, it looks much bigger than the sun. ②The sun is bright enough to give out very strong light. The moon can't give any light at all, but it looks quite bright, too. Why? In fact, the light from the moon comes from the sun. ③But in fact the stars are much bigger and brighter than the moon.

    ④在宇宙中仍然有许多其他的行星。But of all these planets, only on the earth there are living things. People on the earth have studied the space all the time. They've sent many spaceships into the space many times. On November 3 and 14,2011,Chinese scientists let Shenzhou Ⅷ successfully dock with(对接)the Tiangong Ⅰtwice. This is one of the greatest events in the history of China's space.

    In the universe, as we all know, there is the sun, the moon, the earth and a good many stars. Through our geography lessons, we know the earth goes around the sun, and the moon goes around the earth. We have day and night because the earth keeps turning all the time. When our part of the earth turns to the sun, it is day. When our part of the earth turns away from the sun, it is night.

Just because the moon is closer to the earth than the sun, it looks much bigger than the sun. Big things will look smaller when they are further, and small things also look bigger when they are nearer.

    The sun is big enough to give out very strong light. The moon can't give any light at all, but it looks quite bright, too. Why? In fact, the light from the moon comes from the sun. The moon looks much bigger and brighter than the stars. But actually (事实上) the stars are much bigger and brighter than the moon. They look smaller than the moon also because they are further away from the earth.

    There are many other planets in the universe. But of all the planets, only on the earth there are living things and people can only live on the earth, too. But at 9:00 a.m. on October 15th，2003, Chinese pilot Yang Liwei was sent up to space. He stayed there for 21 hours. It was the first time for Chinese to get into space.