1. The book says that there are millions of stars in the cluster of the Milky Way, and they form a team. Just like the police are divided into several teams, some stars are far away from us and some are close to us. The brighter the light of a star looks, the closer it is to us. The darker the star's light looks, the farther away it is from us.

2. The farthest galaxy is more than10 billion light years away from us.

3. The moon is the first stopover for human beings to fly out of the earth and step into space, and it is also the only planet that human beings have left footprints outside the earth so far.

The moon seems to be an immortal "sky lamp".

A poem named "Street in the Sky" in the book is beautifully written, which seems to bring us into the artistic conception of beautiful starry sky.

6. This book is in sharp contrast with the previous reverie with some modern things, which shows the author's love for the sky and people's praise for it.