What is a Mesir object? Are the objects in the Messier Celestial Surfaces all Earth visible galaxies

The Mesir objects in the Perseus Arm are as follows:

m 1, Crab Nebula.

m 36, open cluster.

m 37, open cluster.

m 38, open cluster.

m 52, open cluster.

m 103, open cluster.

Some Mesir objects in the Centaur arm:

M8, Lagoon Nebula.

M11, Mallard Cluster.

M16, Eagle Nebula.

m17, nebula.

m18, open cluster.

m20, trifid nebula.

M21 Open Cluster.

M24, Sagittarius Nebula.

M26 open cluster.

m55 globular cluster.

In 1758, the French astronomer Messier discovered the Crab Nebula in the constellation Taurus while searching for a comet. Since then, he has devoted himself exclusively to the observation of nebulous objects, discovering many nebulae, clusters and galaxies that have been combined into the Messier Catalog. In the catalog, each object is numbered with m.

For example, the Crab Nebula is m1. There are a total of 110 celestial objects listed in the table, most of which are within a magnitude of 10 and can be seen with small astronomical telescopes. Astronomers now use the New General Catalog of Nebulae and Star Clusters, or NGC for short, which includes 7,840 nebula cluster galaxies; There is also a supplementary table of the NGC catalog, referred to as the IC catalog, which includes 5836 nebula cluster galaxies.

The 110 M objects in the Messier catalog are the essence of the NGC and IC catalogs, and they are also the most spectacular and beautiful objects in the sky. Many M objects are living samples for astronomers to study the evolution of celestial bodies. For example, valuable information on the late evolution of stars can be obtained from the M1 nebula, and spectacular images of the birth process of stars can be obtained through M8, M16, and M42.

No.: NGC, Right ascension, Declination, Aperture, Luminosity, Constellation, Notes.

m1 1952 5h +22 01' 36x34'Taurus Crab Nebula.

m20 6514 18h -23 02'29x27 Sagittarius Trilobe Nebula.

m31 224 0h +41 16' 178x63'Andromeda The Great Nebula in the consins Andromeda.

m42 1976 5h -5 27 66x60 4 Orion The brightest nebula.

m43 1982 5h -5 16'20x15 9 Orion Diffuse Nebula.

m44 2632 8h +19 59'95 Cancer Scattered Star Cluster.

m45 mel22 3h +24 07'110 Taurus Pleiades.

There are not only stars in the constellation, but also Messier objects. Messier objects include nebulae, star clusters, and galaxies. Nebulae are cloud-like objects formed by the combination of gas and dust in interstellar space.

A star cluster is a group of stars with more than 10 stars that are physically connected (gravitational) to each other.

Star clusters can be divided into two types: one is globular clusters, which are made up of thousands of elderly stars that are tightly bound together by gravity; The other is open clusters, which generally have only a few hundred stars, usually composed of younger stars and are loosely structured. Galaxies are gravitationally bound systems that contain stars, planets, cosmic dust, gases, star clusters, nebulae, dark matter, etc.

Why are these different kinds of objects called Messier objects? Here's another interesting story.

In the 18th century, there was a French astronomer named Charles Messier. In the 18th century in the West, the discovery of comets could make a person famous in the astronomical world, and Messier was one of the "comet seekers". During his observations, he noticed that there were many vague-looking objects in the sky, which looked like comets, but they were not comets, and could easily be confused with comets.

In order to facilitate the search for comets, Messier and his assistants recorded these celestial bodies and compiled them into a catalog. To his dismay, he never found a new comet, but more and more objects were recorded in the catalog. Later, he published the catalog in a scientific journal and made it public.

Because it contains many nebulae and star clusters, he simply called the catalog "Catalog of Nebulae and Clusters". These comet-like objects are known as Messier objects.

Later, astronomers continued to add newly discovered Messier objects to this table. Today, this catalog has become a very important astronomical document. There are iconic Messier objects in Xu Qingbo's many constellations, do you want to "face each other" with Messier objects?

Let's get out the telescope together!

Messier was a comet collector, and he wrote a lot of celestial bodies, and those objects were called Messier objects.

I think the Messier object is one of the celestial bodies in the planet, so I think the Messier object is very mysterious.

It is a book written by a French astronomer, Messier, in which 110 celestial objects are listed.

This is a comet discovered by a French astronomer in the 18th century, and because the situation is very special, he named it this name.

The landlord's point of view is wrong.

Messier is a comet seeker, even to the point of madness. However, there are some celestial bodies in the sky, and the effect of observation in a small telescope is relatively similar to that of a comet (most of the time, the comet is either what it looks like in the textbook**, or a small cloud of hazy clouds, as shown in the figure below).

For Messier, these objects are a major interference in the comet search, so it is necessary to make a special list of observations to rule out their interference. Therefore, whether it is a star cluster, a nebula, a galaxy, or even a number of distinctive binary stars (M40), they are all included in this list by Messier (on the contrary, some deep-sky objects that do not interfere with comet observations, such as hanger clusters, are magnificently ignored). In Messier's lifetime, if I remember correctly, it was numbered No. 103, and the last few were added with the help of later generations.

Perhaps he didn't expect that this list included most of the easy-to-observe deep-sky objects, in a way he hadn't expected at all.

Now you can answer the last two questions of the landlord. These 110 deep-sky objects are not the only ones visible, but the NGC Catalog, which contains thousands of deep-sky objects, is more comprehensive than the Messier Catalog. The 110 celestial bodies are not all part of the Virgo-Late Cluster of Galaxies, and are scattered in all corners of the celestial sphere except for the southern celestial pole.

It does not matter. These are two different forms of celestial bodies.

The New General Catalog of Nebulae and Star Clusters (NGC) is one of the most widely known catalogs of deep-sky objects in amateur astronomy. It includes 7,840 objects, known as NGC objects.

Messier objects refer to the 110 celestial bodies listed in the Catalog of Nebulae and Star Clusters compiled by the 18th-century French astronomer Messier. Messier himself was a comet seeker, and he assembled this catalog of celestial objects in order to make a note of the celestial objects in the sky that resembled comets rather than comets.

Messier objects can be found mostly in the NAC catalog.

Messier objects refer to the 110 celestial bodies listed in the Catalog of Nebulae and Star Clusters compiled by the 18th-century French astronomer Messier. Messier himself was a comet seeker, and he assembled this catalog of celestial bodies in order to make a note of the celestial objects in the sky that resembled comets rather than comets, so that he would not be confused by them when he searched for the real comet.

The first edition of the Catalogue of Nebulae and Clusters, published in 1774, recorded 45 objects, and their numbers were increased from M1 to M70. The final edition of the Catalog of Nebulae and Clusters, published the following year, collected a total of 103 objects up to m103. At present, there are 110 Messier objects in Bichangxin, and M104 to M110 were created by Messier and his friend Pierre

méchain) and not included in the Catalog of Nebulae and Clusters.

However, later generations found that M40 is a pair of binary stars in the constellation Ursa Major, M73 (NGC6994) is a group of small stars in the constellation Aquarius, and M102 is said to have been "discovered" by Mei Xiang in 1781, and he denied it in 1783, in his correspondence to Benuli in Berlin, Xun said that it was a duplicate record of M101's observations, so in fact, Messier et al. observed 107 deep-sky objects. M40, M73, and M102 are often referred to as "lost Messier objects".

Messier objects refer to the 110 celestial bodies listed in the "Catalog of Nebulae and Star Clusters" compiled by the French astronomer Messier in the 18th century. Messier himself was a comet seeker, and he assembled this catalog of celestial objects in order to make a note of the celestial objects in the sky that resembled comets rather than comets, so that he could find the real comets without being confused by them.

The first edition of the Catalogue of Nebulae and Clusters, published in 1774, recorded 45 objects, and their numbers were increased from M1 to M70. The final edition of the Catalog of Nebulae and Clusters, published the following year, collected a total of 103 objects up to m103. There are currently 110 Messier objects, M104 to M110 were added by later generations to the objects discovered by Messier and his friend Pierre Méchain but not included in the Catalog of Nebulae and Clusters.

However, later generations found that M40 is a pair of binary stars in the constellation Ursa Major, M73 (NGC6994) is a group of small asterisms in the constellation Aquarius, and M102 is said to have been "discovered" by Wu Huixiang in 1781, and in 1783 he denied it, saying in his correspondence to Benuli in Berlin that it was a duplicate record of M101's observations, so in fact Messier et al. observed 107 deep-sky objects. M40, M73, and M102 are often referred to as "lost Messier objects".