What is the difference between space and the universe?

Space only includes space, especially the space outside the earth (or all stars).

The universe includes all the planets, the Milky Way, all the constellations, and even we are a part of the universe. The universe refers to this huge whole and the collection of all our substances.

Second, the formation of differences;

There are about 200 billion stars and tens of billions of planets in the universe. Planets less than 500 kilometers in diameter have enough gravity to compress themselves into spheres. If the diameter is smaller than this, it will keep its original shape. There are billions of stars in the Milky Way. The solar system was formed 4.6 billion years ago. The speed of the earth's rotation is 66,000 kilometers.

The earth has a ground, an ocean and an atmosphere, which do not belong to space, but to the earth. Space is a space, and all the planets are dotted in this airless space. Basically, the sum of all planets, stars, nebulae and space is equal to the universe.

Ordinary substance

Compared with 380,000 years after BIGBANG, the mass and energy ratio of the universe obtained from WMAP data shows that the remaining 4.9% of the mass and energy in the universe are ordinary substances, namely atoms, ions, electrons and their formed objects.

Matter includes stars (which generate light from almost all galaxies), gases in planets, interstellar and intergalactic media, and all objects that can be touched, touched or squeezed in daily life. In fact, most ordinary matter in the universe is invisible, because the visible stars and gases in galaxies and clusters only account for 10% of ordinary matter.

Above content reference: Baidu Encyclopedia-Universe