The Milky Way

The Milky Way https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhcEkPxTemKgJocG8zhXWH5GHKHykLlVN_PVeG-owYmEnRrzwK6DRPqIzkaYJCNzuLz9TY2srXrzPMF86MalQA8RUGzAznyuC14L-Sb_W2RYXiX2phLQ78XLxWN9Q4shXFfI84yj-f27Ms/w1200-h630-p-k-no-nu/La+V%25C3%25ADa+L%25C3%25A1ctea.jpg

The Milky Way

The Milky Way is the galaxy of which the Solar System is part and therefore the Earth and us.

Background
The term "Milky Way" comes from the Greek mythology in which the goddess Hera was breastfeeding her son, and suddenly he released his chest without warning, and so that milk was spilled. This is according to the fact that when you look at the night sky, there appears to be a whitish path in contrast to the darkness.
It is known that the astronomer Democritus (460 BC - 370 BC) in Ancient Greece suggested that the whitish spot was a conglomerate of many stars, but that they were so faint to be seen by the naked eye. In spite of this nobody supported him until 1609, Galileo Galilei with his telescope could verify that Democritus was right, being that white spot, a road full of stars.

Where is the Milky Way?
Local Group
The Milky Way galaxy is in the so-called Local Group, which is a set of about thirty galaxies, among which is Andromeda.

Besides that the galaxy is in the Local Group, this in turn belongs to the Virgo Supercluster which has an approximate diameter of 200 million light years and contains around 100 groups and clusters of galaxies, dominated by the Virgo Cluster near the center and the Local Group is close to it, which in turn is within the local hypercluster, which contains many supercumuli.

Where is the Milky Way going and how fast?
Great Attractor.
The Milky Way and Andromeda will merge in about 5 billion years and carry speeds of 468,000 km / h (four hundred and sixty-eight thousand kilometers per hour).

In 1987 a group of 7 astronomers called "the 7 samurai" or "the magnificent 7" measured the coordinated movement of millions of galaxies around us, determining that Local Group together with thousands of other groups are quickly heading to the structure called "The Great Attractor "and moving at 2'160,000 km / h (two million, one hundred sixty thousand kilometers per hour).

What shape does the Milky Way have?
Although we can not see the Milky Way directly from another perspective than in it, it is remembered that it is a spiral galaxy, but observations in the 90's suggested that it is a barred spiral galaxy.
In 2005 NASA's Spitzer space telescope confirmed the suspicion, concluding that the central bar of the galaxy is longer than previously thought.
Galaxia NGC1300, which like the Milky Way is a barred spiral galaxy.

Arms of the Milky Way
The arms of the Milky Way are extensions of millions of stars that emerge from the center of the galaxy in the form of a logarithmic spiral.

The Arm of Orion is where the Solar System is located, among others are: the Arm of the Swan, Arm of Norma, Arm of Sagittarius, Arm of Perseus and the Arm Shield-Centaur, these last 2 make up the 2 main arms, the which leave the ends of the bar that is in the center of the galaxy.

How many stars are there in the Milky Way?
Although we can not currently count each of the stars that are in the Milky Way, among other things because many we can not see, you can make a calculation of it.

It can be calculated by observing the orbit of the stars in the disk of the galaxy, obtaining the orbital velocity of the galaxy and calculating its mass later.
After determining this and subtracting the halo of dark matter that constitutes 90% of its influence, astronomers make an estimate of the masses and types of stars in our galaxy in order to obtain an average mass.

So it was estimated that there are 300 billion stars in the Milky Way. (According to Yale University in 2008).

How many planets are there in the Milky Way?
On February 19, 2011, scientists released their results in the first estimate of the planet's census in the galaxy, concluded that there are at least 50 billion planets in the Milky Way, of which 500 million are in the area of habitability (or "golden curls"), in which the distance to its star (s) are neither too hot nor too cold. [***[***^one]

How big is the Milky Way?
The diameter of the Galaxy is calculated at 100 thousand light years.

According to Astrophysics Professor Bryan Gaensler and his collaborative team, they estimated that the Milky Way is 12,000 light-years thick.

The halo of the Milky Way extends 180 thousand light years, limited by the galaxy Small Cloud of Magellan.

What mass does the Milky Way have?
The mass calculated depends on the method used. Recent research estimates that the Milky Way has a mass of 5.8 × 10^eleven solar masses (M_☉).

What is the age of the Milky Way?
In 2007 the star "HE 1523-0901" in the galactic halo, was estimated as the oldest measured object of the Milky Way with an age of 13,200,000,000,000 years (thirteen thousand two hundred million), 500,000 years more than the beginning of the universe.

This star was the first to be measured through the decay of radioactive elements of Uranium and Thorium. It is believed that it was formed after the first generation of stars in the early Universe.
Being the oldest object measured in the galaxy, it is taken as a parameter of its age.

What is in the center of the Milky Way?
The Sun is 27,700 light-years away from the center of the Milky Way.
In the center of the galaxy is a supermassive and very compact object.

This supermassive object is called Sagittarius A * (with an asterisk because Sagittarius A is the region where it is found), which is a supermassive black hole. In 2008 it was revealed that the diameter of our black hole is 44 million kilometers and it has a mass of 4 million solar masses.

Curiosities:
· The Milky Way is also called "the way of Santiago" because in Spain, specifically in Galicia, the city of Santiago de Compostela is located, in which the apostle Santiago el Mayor advanced there in the 1st century, and in the Age Half a lot of pilgrims went to the tomb of the apostle Santiago to pray to him, in that journey along the route they were traveling in, they could perceive in the night sky a white strip that directed them directly to their destination.

Edwin Hubble
· Even though Harlow Shapley showed that the Milky Way is 100 thousand light years in diameter, between 1923 and 1924 the investigations of Edwin Hubble revealed that the nebulae of Andromeda, the Small and Large Clouds of Magellan, were not nebulous but had a more complex system. He realized that Andromeda was at a distance measured at that time of 800 thousand light years and if the Milky Way was 100 thousand light years in diameter, then the "nebula" Andromeda had to be outside the Milky Way. This was a great discovery since before this, it was thought that the Milky Way was the Universe itself, beginning thus, to discover new galaxies.

· The Milky Way is a cannibal galaxy, since it is at a time when it is swallowing other galaxies around it.

· We can only see .0000 03% of the Milky Way with the naked eye on a clear night.

· 90% of the mass of the Milky Way is dark matter.

· The largest star of the Milky Way Pemis 24-1 really is a star system, consisting of 3 stars orbiting each other.

. Share In:

SOURCE LINK THE BEST ONLINE UFO WEBSITES
https://www.beviral.online