How many galaxies are there outside the galaxy, and what is the difference between an extragalactic

n! There is no way to verify the drip !! After all, humanity hasn't even explored the Milky Way yet!

Only the solar system was explored! So there is simply no way to get evidence, how much! Plus, we're not sure if there's only one universe!

Isn't there a similar world besides the universe! No one knows! Humanity is too small!

These may not be a bit of an eyebrow until the end of the earth! Hehe! The earth will perish!

Because the sun will go out! The day the sun goes out is the beginning of the end of the earth!

There are countless of them, and now more than 10 billion have been discovered.

There are countless of them, and no one knows anything in the universe.

More than 120 billion, on the geography books.

Except for the Milky Way, it's all ah, and it's more.

Even if people tell you, even scientists tell you, it's not necessarily true.

It's good to know that it's "innumerable". Don't just be a person who reads dead books.

The problem that scientists are studying.

Extragalactic galaxies are galaxies that are made up of a large number of stars outside the Milky Way. Because of the distance, it appears as a blurred point of light on the surface, so it is also called"Extragalactic nebula"。Extragalactic galaxies, like the Milky Way, are made up of a large number of stars, star clusters, nebulae, and interstellar matter.

About 1 billion galaxies similar to the Milky Way have been observed. According to their shape and structure, they can be divided into: spiral galaxies, barred spiral galaxies, elliptical galaxies and irregular galaxies.

The total number of extragalactic galaxies is estimated to be more than 100 billion. The most common classification of extragalactic galaxies was proposed by Hubble in 1926.

The discovery of extragalactic galaxies has expanded human understanding beyond the Milky Way galaxy for the first time, and is an important milestone in the process of human exploration of the universe.

The milky way (English: the milky way, also known as Yinhan, Tianhe, Milky Way, galaxy, Tianhan, etc.), is the barred spiral galaxy where the solar system is located, including 1000 400 billion stars and a large number of star clusters, nebulae and various types of interstellar gas and interstellar dust, the Milky Way is a silvery-white ring around the sky from the earth. With a total mass of about 210 billion times that of the Sun, it belongs to the local group of galaxies, and the nearest extragalactic galaxy is the Dwarf Canis Major galaxy, 42,000 light-years away.

The Milky Way is an oblate sphere with a massive disk structure consisting of a bright and dense core, two major spiral arms, and two unformed spiral arms, which are 4,500 light-years apart. The Sun is located on the Orion Arm, a branch of the Milky Way, and the distance from the center of the Milky Way is about 10,000 light-years.

The Milky Way's ** is a supermassive black hole (Sagittarius A*), which is composed of a galactic core, a galactic core, a galactic disk, a galactic halo, and a galactic crown from the inside out. Most of the Milky Way** regions are old stars (mainly white dwarfs), and the outer regions are mostly new and young stars. There are more than a dozen satellite galaxies scattered over an area of hundreds of thousands of light-years, the larger of which are the Large Magellanic Cloud and the Small Magellanic Cloud.

The Milky Way grows by slowly devouring the dwarf galaxies around it. In March 2015, scientists discovered that the Milky Way is 50% larger than previously thought.

The Andromeda Transgal Galaxy is a huge spiral galaxy, also known as the "Andromeda Nebula". Its structure is similar to that of the Milky Way, with dense nuclei, spiral arms, galactic disks and galactic halos, containing 300 billion to 400 billion stars, as well as stellar clouds and dark regions, as well as special objects such as variable stars, star clusters and novae. The Andromeda Transgalactic Galaxy is 2 million light-years away from the Milky Way.

The extra-Virgo galaxies, also known as the straw hat galaxies, are giant spiral galaxies. From the side** protruding spherical, the edge of the equator is disc-shaped, and there are spiral arms on all sides. The Straw Hat Galaxy has a massive mass, about 1,300 billion solar masses and a diameter of 140,000 light-years.

The distinguishing feature is a dark streak of astral light across the galaxy nucleus.

The Canis Extragalactic Galaxy, one of the famous extragalactic galaxies, is a spiral galaxy that is relatively close to Earth. It is located north of the constellation Canis, about 14 million light-years from Earth. The galaxy also belongs to the spiral galaxy and has a spiral arm.

Astronomers believe that a planet orbiting a star in the Spiral Galaxy Canis is likely to be home to intelligent extraterrestrial life. This sun-like star is called Beta CVN, and the planets around it appear to have all the prerequisites for life and advanced civilization to develop.

Located 160,000 light-years from Earth, the Great Magellanic Galaxy is the closest major extragalactic galaxy to Earth, with about 10 billion stars. It takes more than a billion years for them to go around in circles. The shape resembles an irregular galaxy, but there are traces of a spiral structure.

The galaxy is rich in gas and interstellar matter, and undergoes star-forming activity.

Andromeda River extragalax.