There are several galaxies in the universe and which galaxies are there in the universe

There are about 5 billion extragalactic galaxies that have been discovered, and together with our own Milky Way, collectively known as total galaxies, represent all the cosmic ranges that humans have come into contact with so far. But the universe itself is infinite and expanding, so there should be an infinite number of extragalactic galaxies that we don't yet know. There is no exact number of how many galaxies there are in the universe, some say more than 80 billion, some say more than 100 billion, some say 1000 200 billion.

In 1995, astronomers used the Hubble Space Telescope to observe outer space in the north and estimated that there are about 80 billion galaxies in the universe. Three years later, in October 1998, observations were made in outer space in the south, and the number of galaxies in the universe was estimated to be 125 billion.

The reason why the figures for the two observations differ so much, explained by Harry Furguson of the American Space Telescope Science Institute, is due to the fact that the observation distance of outer space in the south is greater than that of outer space in the north.

From this, we can know that there are more galaxies in the universe than 125 billion, because the Hubble Space Telescope does not see the edge of the universe.

The Andromeda Galaxy is the closest galaxy to our own galaxy. It is a typical spiral galaxy, but larger than the Milky Way.

Brother: The universe has not been explored so far, how can we know how many galaxies there are, so there are countless of them.

1. Common galaxies are divided into the following types: elliptical galaxies, hat galaxies, spiral galaxies, lenticular galaxies and irregular galaxies. The Milky Way is a typical spiral galaxy, and our solar system is on the spiral arm of Orion, the third vortex of the Milky Way.

2. The number of galaxies that have been measured by human observable fluid has reached 125 billion, and there are many that we cannot observe at present.

3. It is understood that the Laniakea supercluster, where our Milky Way is located, contains about 100,000 galaxies, with an area of about 100 million parsecs (100 million light-years).

4. Galaxies, also known as cosmic islands, are derived from the Greek word galaxias). In a broad sense, galaxies refer to the operating systems composed of countless galaxies and dust. Referring to the Milky Way, it is a large galaxy containing stars, airborne bodies, cosmic dust, and dark matter, and is bound by gravity.

5. Typical galaxies, ranging from dwarf galaxies with only tens of millions of stars to elliptical galaxies with trillions of stars, all orbit around the center of mass. With the exception of individual stars and thin interstellar matter, most galaxies have a large number of star systems, star clusters, and a variety of different nebulae.