Approaching dark matter hurricane will collide with earth, predict scientists

Rodiano Bonacci
Novembre 17, 2018

A stellar stream is a collection of stars, gas and space rubble that was once a dwarf galaxy itself, that collided with a larger galaxy - in the case of S1, our Milky Way.

The discovery of Antlia 2 challenges the current models of galaxy formation today.

It is 10,000 times fainter than any satellite in the milky way, it has been dubbed ANT 2 by the scientists.

The research team also revealed that the Ant 2 never comes too close to the Milky Way and it always keeps a minimum distance of 40 kiloparsecs, which is about 130,000 light-years.

An worldwide team of astronomers discovered the object-described by the University of Cambridge as "enormous" and "massive"-while sifting through data from the space observatory".

Ant 2 is also unusual because of how little light it gives out.

Compared to the Large Magellanic Cloud, Antlia 2 is 10,000 times fainter.

According to the University of Cambridge, if it is impossible for the dwarf galaxy to have grown as the Milky Way stripped its mass away, then Ant 2 must have been truly enormous.

Adding heat to the outlandish apocalypse claims surfacing all around the internet, a team of astronomers has suggested that an incredibly fast dark matter hurricane will soon slam into the earth as it moves through the Milky Way.

The study used the data collected by Gaia, which has produced the richest star catalog to date. As structures developed in the early Universe, smaller people were the principal cosmic systems to frame, thus the majority of their stars are presently old, moderately low as far as their mass, and poor in metals. The reason behind Antlia 2 having too little mass is that the galaxy is "being taken apart by the Galactic tides of the Milky Way", astronomers believe.

Lead author Gabriel Torrealba, from the Institute of Astronomy and Astrophysics at Academia Sinica in Taipei, Taiwan, said: "This is a ghost of a galaxy". These stars are old and metal-poor, typical of those found in a dwarf galaxy.

Alternatively, Ant 2's low density could mean that a modification to the dark matter properties is needed. But a dedicated research team has managed to spot Ant 2 by venturing deep into the data collected by the European Space Agency's Gaia satellite, which has so far observed almost 1.7 billion stars. When they observed these stars closely, they noticed a new object, a ghost galaxy. The researchers were also surprised when they estimated the mass of the ghost galaxy, it was very low for its vast size. However, this does not explain its impressive size.

Dr Matthew Walker, from Carnegie Mellon University, added: "We are wondering whether this galaxy is just the tip of an iceberg, and the Milky Way is surrounded by a large population of almost invisible dwarfs similar to this one". We're talking about the S1 dark matter "wind", a current that would be part of a dwarf galaxy that was swallowed by the Milky Way billions of years ago, and which is heading towards Earth.

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