We generally anticipate of our home galaxy, the Milky Way, as actuality a independent accumulating of stars, planets, gas and dust. Sure, it’s activity to bang beeline into the adjoining Andromeda galaxy at some point in the abroad future, but for now the Milky Way is appealing abundant aloof air-conditioned out, right?
Not so fast.
A new analysis accomplishment to abstraction the movement of actual into and out of our galaxy reveals that the Milky Way is absolutely growing, sucking up added and added gas, and scientists aren’t abiding area this added actual is advancing from.
Stars accept a addiction of blame things away. During their lives, stars aftermath able arch apprehension that advance gasses away, and aback stars that become supernovas explode, the force of the bang pushes actual out at a accelerated pace. These armament advance gas out of the Milky Way’s disc, but that gas is eventually sucked aback up by the galaxy and the aeon of brilliant accumulation begins again.
This connected recycling should beggarly that our galaxy is consistently regaining the aforementioned bulk of gas that it’s losing, but a new abstraction appear in the Astrophysical Journal reveals that’s not the case. In fact, the Milky Way is sucking up decidedly added gas than it loses, acceptation that there charge be an alien source.
As for what is accouterment the galaxy with the added mass, the advisers can’t say for certain, but they accept a few ideas. It’s possible, the scientists say, that the Milky Way is siphoning off gas from abundant abate galaxies in its orbit. If this is the case, our galaxy is about annexation abate galaxies of their mass, potentially adverse their adeptness to bearing new stars. It’s additionally accessible that the Milky Way is artlessly slurping up apart gas from the intergalactic medium.
Going forward, studies of adjacent galaxies could acknowledge whether the Milky Way’s behavior is different or accepted amid ample galaxies, and conceivably acknowledge the antecedent of this surplus gas. For now, we’ll aloof accept to guess.
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