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Astronomers Say There May Be Other Universes That Are Better for Life

Maybe we haven’t discovered alien life because it’s all evolving in other universes. A team of astronomers have just published a research paper proposing that other universes could be far more livable than our own. It all depends on a few circumstances right when those universes were born. There is now a lot of confirmation that we might live in a multiverse, where there are as many universes as there are galaxies in our universe. Every universe will possibly have unalike physical laws and properties, too. As University of Michigan physicist Fred C. Adams and his coworkers say in their research paper on arXiv, one of the major variances might be in each universe’s “amplitude of primordial density fluctuations,” known as Q for short. Fundamentally, Q defines the difference between dense and empty regions of space — in this situation, in a universe. A high Q means there are high fluctuations, with tremendously dense areas and exceptionally empty areas. In our universe, for an instance, Q isn’t all that high, which is reason why we have a lot of matter spread out all over the place, with vast spaces in between stars and galaxies. But what if we existed in a universe with a high Q, and our galaxies were far deeper than they are in this universe?
Image via NASA

Firstly, stars would be tremendously close together so you’d be receiving sunlight from all around — not just from your native star. It might be a lot more unsafe, with more huge rocks zooming around and smashing into stuff, and more stars bumping with each other in huge explosions. But this type of high Q galaxy would also be much warmer and extra hospitable than our present ones. Actually, it’s imaginable that you could live on a free-floating planet just type of drifting around the galaxy, covered in the light of hundreds of close by stars. Ruth Angus writes about the paper on Astrobites as“There is another opportunity for galaxies with a higher Q than ours. If stars are just the right distance apart that all the free-floating planets in the galaxy are bathed in gentle, warming radiation, a planet won’t even need a host star to be in the ‘habitable zone‘! There could potentially be millions of free-floating, habitable planets, heated purely by starlight. These planets would need to be far enough from the galactic center that they avoid collisions and extreme radiation, but not so far that they aren’t heated enough but starlight. They need to lie in, what the authors call, the ‘Galactic Habitable Zone’.”

So you might have a much more livable galaxy than we have right now. Life could develop nearly anywhere, even wandering between the stars.

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