When talking about the constellations and galaxies we are mentioning two fundamental elements of the beginning of the universe.
constellations and galaxies
First of all, it is essential to express the meaning of the constellations and galaxies to have in itself a better perspective of these two parts of the cosmos. Consider:
Constellations
Una constellation is precise as an aggregate of stars and their focus in the sky it is universally unalterable. Throughout time, the localities that noticed the constellations decided to give them a pseudonym according to their profile formed by non-perceptible lines that link the stars of the congregation.
The stars in the field of constellations
All the stars they can even be very distant from each other and are unequal, that is, unjust according to knowledge and the locality that equals them. The first populations that revealed them were from the Middle East and continuously from the Mediterranean. There are other classes of constellations and with dissimilar designations, among the 88 public ones are in the same way those of the zodiac and five classes of them: the circumpolar ones that were seen in the northern hemisphere throughout the year.
The spring constellations such as is the case of those made by the Crater, Leo and Hydra; those of summer; of autumn that allow us to distinguish galaxies that are far beyond our Milky Way as is the case of those of Andromeda, the Aquarius and also those of Pegasus. In another sense, one can also mention the winter constellations.
constellation division
The constellations are divided as they are limited, for this reason the northern and southern ones are found, the latter in the southern hemisphere. In this order of ideas, it is known that the first star congregations to be revealed were in Mesopotamia, almost 4000 years before Christ, and some of them carried the nickname of animal beings such as Leo, Taurus and in the same way, Scorpio.
almost for sure the function of these aggregates of stars in prehistory was to calculate time and place sailors or vendors during their tours of seas or lands omitted. It was so that the constellations were always taking an identification and stories related to their nickname.
The constellations and their history
The Greeks alluded Orion the one that the Egyptians were already exploring as Sahu. While the Zodiac was founded by the populations of Babylon in the sixth century BC, it will be adopted by the Greeks some time later. The first inventory of constellations dates back to the 1.022nd century BC, the work of Ptolemy who in his "Almagest" gathered 48 patrimonial stars to XNUMX constellations. Ptolemy's information had part in Alexandria.
In the same way Chinese constellations are significant and the oldest in the world. They are determined to be autonomous congregations since Chinese observers divided the sky into thirty-one regions, among which there were 328 dwellings. The spaces are limited in the northern hemisphere and can be distinguished in the high amplitudes, while the dwellings would be the European constellations that invade the zodiac region.
The abodes differ from the western constellations as are not linked to the movement of the Sun, but to that of the Moon in its periodic path near the Earth.
Designes of the most famous constellations
Now we distinguish how the most frequented constellations are cited. The myth of the zodiac is due to an area of the sky divided into twelve uniform parts, like the months of the year and the constellations of the zodiac are created by: Aries, Taurus, Gemini, Cancer, Leo, Virgo, Libra, Scorpius, Sagittarius, Capricornus, Aquarius and Pisces. These are the qualifications of the most famous constellations.
However, to these constellations Ptolemy, increased 36 figures more, among them: Andromeda, Hercules, Ursa major and Ursa minor, Argo, Canis major, Centaurus, Cassiopeia, Crater, Eridanus, Canis minor, Hydra, Orion, Pegasus, Perseus,. These constellations and more were alluded to in Ptolemy's most significant work, which was mentioned above.
The Arabs tried to increase the constellations by joining stars that could not be seen from Alexandria. In the sixteenth century when the European sailors began their voyages through the oceans, they realized that many areas did not have designs and therefore set out to create others.
The galaxies
A galaxy is an aggregate of vapors, particles and stars and their solar systems. The galaxy remains coupled due to the force of gravity. The Milky Way, our galaxy, likewise has a in the middle.
When at night we notice the stars in the sky, we are observing other stars of the Milky Way. If it is very dark, separated from city lights and houses, we can even notice how the dust fractions of the Milky Way are diffused in the sky.
galaxy shapes
Some galaxies have a spiral profile, as is the case with ours. They have curved arms that make them look like pinwheels. Other galaxies are flat and have an oval representation. They are called elliptical galaxies. In the same way there are nebulae that do not have a spiral or oval shape. They are irregular in profile and look like stains. The light that we notice of each one of these nebulae comes from the stars in their intimate part.
Sometimes galaxies get very close and collide with each other. According to various information sources, the Milky Way will one day collide with Andromeda, our closest galactic neighbor. But don't worry. There are about five billion years left for that to happen. And even if it were to happen tomorrow, you may not even notice it, since the galaxies are so large and so spread out on the sides that, even if they collide with each other, the stars and solar systems often fail to collide.
Differences between constellations and galaxies
a galaxy or a nebula is a large volume contiguous formed by very many stars, space dust, vapors and atoms. While in the case of a Constellation we are emphasizing a set of stars that, through fictitious lines on the supposed astral surface, create a drawing that recalls an established figure, such as that of an animal, a mythological protagonist, among other aspects. That is, a nebula is within a constellation.
Conclusions about constellations and galaxies
Una galaxy is an aggregate of different stars, vapor clouds, stars, space dust, dark component, and perhaps black energy, gravitationally incorporated.
Types of galaxies
All the galaxies We can classify them as follows:
1. Elliptical galaxies
They look the same as a spotlight without a disk, with supposedly similar clarity. They do not present fog and dust and are created by old stars, golden and with a low metallic component.
2. Spiral galaxies
They exhibit a shaft or stem made by a disc with a large sum of steam and star dust.
3. Lenticular galaxies
They show the appearance of a nucleus with a wheel, but without spiral extremities. They are made up of old stars and no steam or dust space.
4. Irregular galaxies
Conclusion galaxies showing no proportion of any kind, neither a focus nor a ring appears determined.
Constellation
a constellation It's a convened congregation of stars whose perspective in the night sky is supposedly close.
How to notice the constellations?
Firstly you have to know that constellations and galaxies are not the same, Therefore, in order to identify the constellations, it is necessary to be able to notice the stars that trace their shapes. People who are in cities cannot distinguish them due to light and contagion, which affects the clarity of the stars. It is necessary to find out a dark area.