Even though there’s not a drop of air out there in cosmos, winds are still traveling the dark infinite at high speeds. Gas particles can reach hundreds of kilometers per second under the influence of supernovae. When stars explode, they can propel streams of photons that swipe gas along. Eventually, these projectiles can travel far and become intergalactic winds. Scientists believe that such phenomena had a saying in the genesis of our Milky Way.
Scientists Used Computer Simulations to Attest the Existence of Intergalactic Winds
Astronomers have been trying to decipher for decades the mechanism that puts galactic winds in motion. Daniel Anglés-Alcázar together with his colleagues at Northwestern University in Illinois started off such an ambitious mission from the process called wind recycling. This happens when the cosmic wind travels the void only for a part of it to be sucked back in. Scientists ran this kind of data in computer simulations to compare them with older versions. The results were surprising.
Their findings indicate that supernovae are powerful enough to eject fast winds of gas. In their turn, they can exit their parent galaxies, sign up for journey of billions of years across the intergalactic space until they enter a different galaxy. As a consequence, the new host can use the additional material to produce new stars.
Half of Our Milky Way May Be Created from Stardust from 1 Million Light-Years Away
The result of the research is a new niche in astronomy that was dubbed as an intergalactic transfer. Scientists observed a pattern according to which the intergalactic winds travel from smaller to larger galaxies such as Milky Way.
Based on the computer simulations, scientists extracted the conclusion that larger galaxies are 50% made of matter that was transported from a far away galaxy. As a consequence, more than half of our Milky Way consists of matter that pertains to another corner of the universe. Planets, the solar system, and even human beings can be made of stardust coming from 1 million light-years away.
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