Cosmic handwritten newspaper

If the universe is compared to the ocean, then galaxies are islands in the ocean. In the boundless "ocean", there are all kinds of "islands"

Scattered everywhere. There are countless stars and various celestial bodies living on the "island", which is called a galaxy in astronomy. The earth where we humans live.

It is a giant galaxy-a small ant in the Milky Way. In the universe outside the Milky Way, space is like the Milky Way.

There are hundreds of millions of giant islands, which we collectively call extragalactic galaxies.

When you look at the night sky with a large telescope, you will find that many galaxies shine like night pearls. They have different shapes, some of which are like spirals.

Vortex, known as spiral galaxy; Some are like round gems, called elliptical galaxies; Some are like short sticks with two braids, called stick vortex.

Galaxies; There are also some grotesque ones called irregular galaxies. At present, the total number of galaxies discovered by astronomers exceeds10 billion.

There are countless galaxies, but only a few close neighbors of the Milky Way can be seen with the naked eye, the most famous of which is Andromeda galaxy.

Yes It is about 2 million light years away from the earth, and its shape is almost exactly the same as that of the Milky Way. It can be said to be a brother. But this brother is getting fatter and fatter.

The slender Andromeda galaxy is about 60% larger than the Milky Way. Just with the naked eye, it only saw a spot as big as a star. ?

Every "island" is a member of "archipelago". These smaller "islands" (including dozens of galaxies) are called constellations; big

Some (including more than 100 galaxies) are called galaxy clusters. They all belong to a larger space group-galaxy group, also called.

Superstar cluster The supercluster where the Milky Way is located is called the local supercluster, and its core is the Virgo cluster. Numerous supercluster clusters form a surface.

The measured universe-the entire galaxy. The observable universe and the unobservable universe constitute a vast universe.

Friends, let's explore more mysterious places in the universe together!

How did the universe come into being?

Scientists believe that it originated from an incredible explosion 654.38+03.7 billion years ago. This is an unimaginable energy explosion.

It takes 654.38+0.2 billion years for the light at the edge of the universe to reach the earth. The material emitted by the big bang was scattered in space, made up of many

A huge star galaxy is made of these substances, and our sun is one of these countless stars. What people originally imagined.

The universe will not expand because of gravity, but scientists have found that there is a kind of "dark energy" in the universe, which will produce a repulsive force and accelerate the expansion of the universe.