Galaxy (Derived from the greek work galaxias ) is a huge system of stars, interstellar gas, Planets, Dust and Black holes . Our Solar system Resides in the huge Spiral Galaxy called Milky way .The next nearest major galaxy to our Milky Way is the Great Andromeda Galaxy.

This article is all about the Andromeda Galaxy. Don’t Miss the chance to learn the most exciting facts about Andromeda. Also, Don’t forget to share this with your Science-obsessed friends!!

1.The Galaxy was named after the Greek Princess – Andromeda

Andromeda Galaxy
Andromeda tied to the rock, while Perseus on his pegasus flies above), by Frederic Leighton
Source: Wikipedia

According to the Greek mythology, Andromeda is the daughter of the Ethiopian king Cepheus and his wife Cassiopeia. Cassiopeia Boasts about her daughter’s Beauty to all worlds, which triggers the  Poseidon‘s  ( God of water Bodies ) Anger.

Poseidon gives her the divine punishment by sending  a sea monster,to take her and to strip and chain her to the rock.  However, she was rescued from death by the pegasus.After Andromeda’s death, Athena (A Greek Goddesses) placed her among the constellations in the northern sky,  the constellation Andromeda, so known since antiquity, is named after her.

Andromeda is represented in the northern sky by the constellation Andromeda, which contains the Andromeda Galaxy.

She is typically depicted with α Andromedae as her head, ο and λ Andromedae as her chains, and δ, π, μ, Β, and γ Andromedae representing her body and legs.

[Similar stories were given in Hindu Mythology : Hindu legends surrounding Andromeda are similar to the Greek myths. Ancient Sanskrit texts depict Antarmada chained to a rock, as in the Greek myth. Scholars believe that the Hindu and Greek astrological myths were closely linked; one piece of evidence cited is the similarity between the names “Antarmada” and “Andromeda” .credits:wikipedia]

2. Andromeda Galaxy was formed 10 billion years ago

Messier 31 – commonly known as Andromeda, is one of the oldest galaxies in the universe.It was Estimated that Andromeda galaxy was formed about 10 million years ago and it is 220 thousand Light years away from our galaxy.

This galaxy was formed due to the collision and merger of protogalaxies (cloud of gas which is forming into a galaxy).It contains the highest population of stars, among the known galaxies.

3. Andromeda Galaxy is visible with Naked Eye

Andromeda, visible from Naked Eye. credits:Wikipedia
Andromeda Galaxy

we can see a few  galaxies without using a telescope.Andromeda is one among them. The nearby Andromeda Galaxy is bright enough to be seen by the naked eye on the dark, moonless nights.

The Andromeda Galaxy is the only other (besides the Milky Way) spiral galaxy we can see with the naked eye.

With 2.5 million light-years away and is about 200,000 light-years across, the Andromeda is the farthest celestial object that human eye could see, without the use of a telescope.

Since the Andromeda was so stable and visible bright star in the Northern Hemisphere, they are used for calculations from ancient times.(Andromeda was one among the 26 constellations discovered by Ptolemy in the 2nd century)


4. The Andromeda – Milky Way Collison Will occur in near future

Andromeda Galaxy
Andromeda Galaxy and Milky way Approaching each other at the rate of 110 km which may result in their collision in 4 billion years

The Andromeda Galaxy and the  Milky Way Galaxy are approaching each other at about 110 kilometers per second. At this rate, the collision will happen in 4 Billion years. In 2012, researchers concluded that the collision is sure using Hubble to track the motion of stars in Andromeda.

While the Andromeda Galaxy contains about 1 trillion (1012) stars and the Milky Way contains about 300 billion (3×1011), the chance of even two stars colliding is very small, because of the huge distances between them.

After the Merge of two galaxies, the Resultant will be called as MilkoMedia, and it will contain some new stars formed as a result of Galactic – collision.

The Below Video by NASA explains how the Collison will Occur and how the new galaxy will be formed.

5. Milky way is more massive, denser and faster than Andromeda Galaxy

Anddromeda and Milky way Galaxy in the night sky
Andromeda Galaxy

It was once believed that Andromeda galaxy is huge and majestic than our Milky way galaxy and Scientists  described  our Milky way the little sister of Andromeda.

But, the Recent inventions have proved that the Milky way is 15 percent larger in breadth. More importantly , Milky way is  denser, with 50 percent more mass, which is like weight.That speed of Milky way is about 568,000 miles per hour, which  is faster than the 492,000 mph speed of Andromeda Galaxy.

But, the volume of Andromeda Galaxy is very high when compared to our  Milky Way. Andromeda consists of dozens of black holes and trillions of stars which is double the amount present in the Milky Way.

6.Presence of double nuclei in the Andromeda galaxy

The center of the Andromeda contains two bright shines, indicating the presence of two nuclei. The heart of the Andromeda have a huge cluster of stars, and scientists suspect the presence of supermassive Black Hole.

There might be a supermassive Black hole Hidden in the Core of the Galaxy which is Recorded in the picture by Hubble’s Telescope , presented below

Adromeda Galaxy
This is a Hubble image of the 100-million-solar-mass black hole at the hub of the neighboring spiral galaxy M31, the Andromeda Galaxy. The compact cluster of blue stars is surrounded by the larger “double nucleus” of M31. The double nucleus is actually an elliptical ring of old reddish stars in orbit around the black hole but more distant than the blue stars. Credit: NASA/ESA/T. Lauer (National Optical Astronomy Observatory)

7. There are 14 Satellite Galaxies orbiting around the Andromeda Galaxy

Like our Milky way Galaxy, Andromeda has satellite Galaxies that orbits around it. There must be a total of 14 Dwarf Galaxies, including the brightest and Largest M32(which can be seen from the basic telescope) and second largest M110. Others are fainter galaxies and were discovered after the 1970s.
On January 11, 2006, it was announced that Andromeda Galaxy’s faint companion galaxies lie on the Andromeda galactic center. The plane of satellite galaxies points toward a nearby group of galaxies , possibly tracing the large-scale distribution of dark matter.

Source: Wikipedia

8. A Tour Around Andromeda Galaxy

This  short Video is Released by NASA Explains the structure and position of Andromeda galaxies with Satellite Images.



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