NASA - Nestled inside the BOSS Great Wall, one of the largest known superclusters in the observable cosmos, this filament contains thousands of galaxies yet behaves less like a random chain and more like a slowly twisting cosmic whirlpool. By analyzing precise distance and velocity measurements of almost 15,000 galaxies from the Sloan Digital Sky Survey, researchers detected a striking pattern.
Galaxies along one edge of the 49-million-light-year structure are rushing toward Earth at hundreds of kilometers per second, while those on the diametrically opposite edge are receding at similar speeds.
In between, the motion reverses smoothly, exactly the signature of rigid-body-like rotation on an almost incomprehensible scale. The rotation period is mind-bogglingly slow, roughly 20 billion years for one complete turn, meaning this galactic tornado has not even managed half a revolution since the Big Bang 13.8 billion years ago.
It's almost impossible for us to grasp the idea that there may be a similar 'planet' with inhabitants like us populating it, but it's also equally impossible to think that in the absolute vastness of the universe - and we still don't have a clue how big it might be - that there isn't one or many, many more planets like us out there.
Just my opinion, but - to tell the truth - I am fascinated by everything they're discovering these days, and how they do it is equally amazing, isn't it?
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There is simply no way to know with certainty if life exists elsewhere in our galaxy or the universe. Anyone saying ther HAS to be is a fool. We can only speak in terms of possibilities. While the ODDS of single cell bacterial life existing is probably better than 90% as you climb up towards more complex life forms the odds drop. And it's entirely possible that we are the ONLY industrial space and capable civilization in existence currently. Others may have existed and gone extinct and others may arise after we die off. But the evolutionary hurdles to a species surviving long enough to leave it's planet are very high. We simply DO NOT KNOW...and are not likely to ever know.
ReplyDeletePeople our age will never learn of another life form right now. If we were to get a radio message it would be so old that the person sending it will be long dead along with the rest of his race.
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