What galaxies are in the universe? What galaxies are there in the universe

Towards the end of the 18th century, Messier completed the Messier Catalogue, which included 103 bright nebulae. Soon after, William Herzell completed a catalogue of up to 5,000 nebulae. In 1845, Lord Ross built a new telescope capable of distinguishing between elliptical and spiral galaxies, and he also found some independent points in these nebulae, providing evidence for Kant's earlier claims.

However, nebulae still failed to gain consensus that they were distant galaxies until the early 1920s, when Hubble used a new large telescope. Hubble was able to identify individual stars in the outer spiral galaxies and identify some of them as Cepheid variables, allowing him to estimate the distance of these nebulous objects: they were too far away to be part of the Milky Way.

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The universe is a vast and mysterious existence, containing countless galaxies. There are many galaxies that have been discovered, and some of the important ones include the following types:1

Elliptical galaxies: Elliptical galaxies usually appear elliptical or nearly spherical in shape and do not have a distinct spiral structure. The interior of their galaxies is mostly made up of aging stars, and one of the most well-known elliptical galaxies is the Andromeda Galaxy.

2.Spiral galaxies: Spiral galaxies often have a distinct structure of spiral arms that rotate around the central core region.

The Milky Way galaxy in which we live is a typical spiral galaxy. And the Andromeda galaxy (also known as M31) is another famous spiral galaxy. 3.

Irregular galaxies: Irregular galaxies are galaxies that do not have a well-defined symmetrical structure, usually caused by the irregular distribution of interstellar matter. The distribution of stars and interstellar matter in these galaxies is relatively chaotic.

The Great Magellanic Galaxy is a typical irregular star Void Orange System. 4.Ellipse-spiral galaxies:

This type of galaxy is somewhere between elliptical and spiral galaxies, and has the characteristics of the central core region of elliptical cluster galaxies and some spiral structures. They are a relatively rare type of astral system, but they still exist in the universe. In addition, there are other special types of galaxies, such as starburst galaxies, active galactic nuclei, and galaxy clusters.

A galaxy cluster is a huge structure formed by the gravitational pull of many galaxies on each other, containing thousands of galaxies. It is important to note that the galaxies we know so far are only the tip of the iceberg, and there are still tens of billions of galaxies in the universe waiting to be explored. Future scientific research will continue to reveal more galaxies and their properties, expanding our understanding of the universe.

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.

From the beginning of the universe to the present, 13.8 billion years have expanded at a very fast rate, and the diameter of the universe that can be observed by humans is 93 billion light.

With a diameter of 160,000 light-years and 200 billion stars like the Sun, as well as countless planets and interstellar dust, the Earth is like a speck of dust in the Milky Way, even if such a massive galaxy is in the universe.

What can it be, IC1101, the largest galaxy observable in human astronomy, it is formed by the merger of multiple galaxies, with a diameter of 4.5 million light years, which can accommodate thousands of galaxies, it is located in the Eberl 2029 galaxy cluster, first discovered by astronomer William Hoschel in 1790, at first astronomers thought IC1101 was just a bright nebula, until Edwin Hubble confirmed that there were galaxies beyond the Milky Way, It was determined that IC1101 was a large galaxy in its own right.

It's the same as a galaxy so large that it seems so small in front of the universe, and it's so huge.

of galaxies in the observable universe are more numerous than we can imagine.

This is the Laniakai Supercluster, spanning hundreds of millions of light-years across the universe, there are at least more than 100,000 galaxies in it, even such a large galaxy network is not the tip of the iceberg of the universe, there is such a cosmic network composed of thousands of galaxies everywhere in the universe, so how many galaxies are there in the universe? If we really want to calculate, astronomers give the answer is at least more than 2 trillion, including what we can't observe, and what we know is only a tiny part of the billion, if we compare the universe to the earth, then we can exaggerate to imagine that every fine particle of dust in the air that cannot be seen is a galaxy.

There are countless galaxies in the universe, each of which has its own operating system, but there are many galaxies that cannot be observed with our current level of technology, but they still exist.