How to understand the universe and what is universe ?

How to understand the mysteries of the universe?

The universe obtained by personal reference is a general term for the vast space and the various celestial bodies and diffuse matter that exist in it. The universe is said to have been formed by a big ** that occurred about 14 billion years ago.

The universe is like the home of all celestial bodies, the universe contains all galaxies and planets, and although we live on the earth, the earth is also in the universe.

The universe is composed of space and time, and the space in which the stars exist.

The universe is a general term for the vast expanse of space and the various celestial bodies that exist in it, as well as the diffuse matter. The universe is the material world, which is in constant motion and development. "Huainanzi Yuan Dao Xun" Note:

The four directions are said to be the universe, and the universe has been said throughout the ages, in order to metaphorize the heaven and the earth. That is, the universe is the general term for all things in heaven and earth. "Yu" is the concept of space, which is boundless; "Zeus" is the concept of time, which has no beginning and no end.

The universe is the unity of infinite space and infinite time. The unity of the universe lies in its materiality, that is, all cosmic space is not material or composed of matter, and the existence forms of matter in the universe are diverse, some of the matter is dispersed in the vast desert space in a continuous state in the form of electromagnetic waves, interstellar matter (gas, dust), etc., and the other part is accumulated into a cluster, which is manifested as various forms of accumulation of entities, such as the earth, the moon, planets, stars and nebulae. All matter is constantly moving and changing.

The largest optical telescope of our time has been able to observe a distant target of 20 billion light years, which is the part of the universe that can be observed by humans today, which is only a small part of the infinite universe. With the development of science and technology, the scope of human understanding of the universe will continue to expand.

The universe refers to infinite space-time. The corpse of the Warring States period (390 BC 330 BC) proposed in "The Corpse": "The four directions are called the universe, and the ancient and modern are called the universe."

According to the definition of the concept of the universe, there is only one universe, and the universe can be divided into observable and unobservable universes. The observable universe is an area that humans can observe, with a radius of about 13.8 billion light-years. The unobservable universe is an area that cannot be observed by humans, with a radius of more than 13.8 billion light-years.

It refers to matter and space-time in general.

The broad definition of the universe is the general term for all things, the unity of time and space. The narrow definition of the universe is space and matter beyond the Earth's atmosphere.

The ancient Chinese believed that the upper and lower four directions were called the universe, and the past and the present were called the universe.

The universe is the material world, and the universe is the ancient and modern time.