Andromeda Galaxy M31 ate sibling galaxy M32 and now it is coming for us

Once Milky Way galaxy had a sibling which get shredded and swallowed by neighbour galaxy 2 billion years ago. The cannibal galaxy is Andromeda which is neighbour galaxy of our Milky Way.

There was a survey going on the stars in faint halo around Andromeda galaxy and they found some interesting results. For those who don't know what is halo? Halo is a cloud of gas and other matter surrounding and captured by the gravitational field of a large diffuse astronomical object, such as galaxy or cluster of galaxies.

Photo by NASA on Unsplash

Scientists created a whole events happened 2 billion years ago on the basis of this survey.

The earlier theory which suggested that the halo consist stars of hundreds of small galaxies shredded and consumed.

Latest New theory published in Nature Astronomy improvised and corrected the previous one.

The new theory based on the survey tells that the halo of Andromeda galaxy consumed only one small galaxy named M32.

"It was shocking to realise that the Milky Way had a large sibling and we don't knew about it "said by co author Eric Bell of nature astronomy research paper and who is professor of astronomy at the University of Michigan.

According to this discovery it is clear that 2 billion years back the biggest galaxy in our neighbour was Andromeda and the smallest one was M32 which got shredded and swallowed by Andromeda.

Richard D'souza post doctoral researcher at the University of Michigan explains it by saying that "it's kind of like a child eating dinner and then looking on the floor afterwards and finding bread crumbs all around".

Eric Bell said that "M32 is a weirdo" as the galaxy contained many young stars and had an elliptical shape. M32 was also one of the most compact galaxies in its time of existence

A fascinating and weird fact about Andromeda the M31 is that 'it is now coming for us' yes you heard it right.

The M31 Andromeda and Milky Way are approaching each other at a speed of 400,000 km/hr and they will take 4 billion years to merge and form a large elliptical galaxy and we will become part of galactic halo after shredding.

What will be our faith we don't know but this can also become one of them.

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