Đây ạ :                                                                                                                                                 

It includes living things, planets, stars, galaxies, dust clouds, light, and even time. Before the birth of the Universe, time, space and matter did not exist. The Universe contains billions of galaxies, each containing millions or billions of stars. The space between the stars and galaxies is largely empty.

The universe consists of all its components as well as space and time. [8] [9] [10] [11] The universe consists of planets, stars, galaxies, components of interstellar space, the smallest subatomic parles, and all matter and energy. The observed universe has a diameter of about 28 billion parsecs (91 billion light years) at present.

tham khảo ạ đừng tố cáo ạ