there is proof that the Earth isn't the center of the universe.

there is no proof that aliens exist

I'm aware there's ppl whom only believe in what they see.

now you are talking about faith

What do you mean by “believe in aliens.”

“Believe in aliens” is generally shorthand for believing that aliens routinely visit Earth and possibly intervene to teach humans fire and how to build pyramids and occasionally probe the rectums of farmhands.

I think you mean, “believe life exists elsewhere in the universe.” That’s the scientific view that statistically there ought to be life elsewhere if only single celled life, but no contact has even been made nor probably ever will.

We don't know how easy it is for life to start and I don't think there is a "centre of the universe" or is that everywhere could be the centre.

I can't remember.

Or probability.. it's more probable they exist than dont.. coming to visit earth is another story

We literally just don't have sufficient information to make a most approximate educated guess, with a sample size of one.

According to the current orthodoxy (Big Bang theory), we are in the center of the universe.

(As is everything else as well).

"yet not believing in aliens"?

What does that even mean? No aliens have ever been documented to exist.

Given the amount of galaxies, stars, and planets, it is unrealistic that the earth is the only planet where life has occurred. It is, however, very likely that the conditions on earth has happened elsewhere

I've never met anyone who says that there isn't life out there somewhere. What people deny is that we get visitors. And seeing the size of the universe, I doubt it too

I don't speak math (one of my few regrets in life), but I am pretty sure that it is a mathematical impossibility of us to be the only planet of sentient beings.

People who read and write math can correct me and I'll take it. Just seems you can't have gazillion stars and tetragazillion planets out there, it would take some serious calculations to "prove" we are as smart as it gets. . . because that really would be depressing . . .

Belief is faith. Believing in aliens is no different than believing in God. Until we get out there and find out more we could just as well be completely alone vs the universe being crowded. Doesn't mean we've always been alone or will be. But we very well could be living in a period where we are the only life in the galaxy.

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Well I see the same distance into space no matter which way I look?? I must be in the center then

> nor probably ever will

Actually, there are several possibilities within reach. Mars had water, so we might find signs of current (or, more likely, past) life. Several moons of Jupiter and Saturn also have water. So, maybe within our lifetimes.

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There is no proof of aliens. I guess you think Enrico Fermi was insane.

There is a difference between "life likely exists somewhere out there" and UFO anally probing some drunk dude.

I believe there is life in the universe other than our solar system. It’s just too big to think that’s not possible.

I just don’t believe aliens have visited our planet because I’m not deluded.

Actually, for intelligent life to occur (and not be destroyed) there may be even more conditions to be fulfilled than the amount of galaxies.

Besides, you are looking only at one dimension here - size of the universe. There is one, even more hard to comprehend - time. And I find it entirely possible that there may have been civilizations before but what can be almost impossible - is to have the right matching for time and place.

Anyways, not taking aliens as a matter of fact is the right scientific approach for now. And probability may go to hell with such a sample size, as someone pointed above.

Not at all. We are the center of our observable universe and that's all. We are not the center of our universe

You have no way of knowing that there even exist a non-observable universe, and in the BB theory, we are indeed in the center of the universe (observable or not).

It isn't unrealistic at all if the odds of abiogenesis are prohibitively small. We can imagine all sorts of events with vanishingly small possibilities. We might not be able to wrap our human minds around the numbers involved, but that's kind of the problem: we look at the size of the known universe and say, well surely, x must have happened at least once. But without a sense of the probabilities involved, we simply do not have any reason to say whether x has happened or not.

There are plenty of conceivable events that happen precisely zero times (things that would violate the laws of physics), and we can imagine possible events that never happen at all -- simply because they are so unlikely that not even trillions of years of interactions between gazillions of particles will bring them about. We might posit that somewhere a teacup from the 1972 Sears-Roebuck catalog is orbiting a planet made of leather. This is certainly possible -- in the sense of not contradicting physical laws -- but it is so unlikely that, no matter how vast the universe is, we cannot be certain that such an item exists. Abiogenesis might simply be one of these mathematically highly unlikely events.

I'm actually not as skeptical about extraterrestrial life as I sound. I do think that, given the tendency that compounds have of quite naturally bunching together into slightly more complex compounds, it does seem reasonable to think that life is fairly abundantly distributed around the universe. But we simply don't know enough about life or about the universe yet. For aught we know, life could exist in the cores of neutron stars and on every god-forsaken rock in the universe -- or just here on this little blue rock for the past few billion years or so. Nobody knows.

So you think that we sit at the absolute epicenter of the universe even though we don't sit at the center if our own galaxy?

Not quite. There is no evidence that God or any gods exist, so it's purely faith. We have evidence that life exists on one planet (Earth), and there is an uncountable number of planets in the universe, so the probability that alien life exists is very real and not just belief/faith. Whether we'll ever find/interact with them is a different issue.

Having been contacted by aliens in the past, though, is still purely belief.

The number of planets and exoplanets does little for the chance of abiogenesis.

Your answered your question with one word "believing". Sorry mate science isn't believe. Yes there is probability of aliens. We have equations like drake. But and this is big but - we haven't found one. Maybe it's as we want it to see. Maybe they have observed our solar system and are debating if Venus, earth or mars has life?

Documented by, like, CBS News? Lots of people have documented it, we just collectively act as if they’re all lying, or hallucinating.

We are the seeds of divinity! CYLONS INCOMING!!!!!

Yes, according to the BB theory all places are in the center of the universe. Because the universe expanded out from a small dense state, so all places was there together.

If course that is if you believe in the BB theory, which I will not use against you if you don't.

You mean grainy videos of strange things in a world were video editing can be done by three year olds.

Yeah, I mean actual physical evidence, like a spaceship that you can touch, or aliens you can talk with or at least dissect.

But sure if grainy videos of black spots is enough evidence for you, good for you.

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Well. Not all is centered around life perhaps. Does not mean that we are not alone. However unlikely.

I believe there is a high chance that simple celled organisms exist elsewhere in the universe. However, space fairing aliens that are so close by they will visit i don't have much faith in.

I believe that we will find conclusive evidence of past or current extraterrestrial life within my lifetime. With all of the probes that we're sending to Mars and the moons of Jupiter and Saturn, as well as our increased observations of potentially habitable exoplanets, we're surely going to find something.

But I highly doubt we will ever come into contact with intelligent life, let alone life that is capable of space travel. Experience here on Earth indicates that such life is extremely rare. Of all the trillions of different life forms that have ever existed on this planet, humans are the only species capable of space travel so far. So the nearest space-faring civilization could be millions of light years away. And if the speed of light acts as a natural barrier, then it should be no wonder that we've never made contact, and likely never will. It took over three billion years for life here on Earth (a substantial chunk of the time when the universe has been able to support potentially habitable planets) to evolve to the point for a single species to begin leaving the planet (and not very far). So it makes sense that the universe is likely not even remotely old enough yet for a life form to evolve to the point when it can break through that speed of light barrier (which I think is a much larger hurdle, if it's even possible, than most people think) and make its civilization known to others.

No. Big Bang theory and the cosmological principles of the universe being roughly homogeneous and isotopic says that there no center of the universe.

We are the center of our observable universe but there is no center of the entire universe at all.

This sentence sounds so interesting but my google searching is just turning up articles about finding habitable planets. Is there somewhere I can read about this?

https://arxiv.org/pdf/1806.08033.pdf

Alot of that goes over my head honestly so heres an explanation from the same guy in video format. https://youtu.be/PqEmYU8Y_rI

They are referring to contact from a sentient alien life.

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We just hide the info in Cheyenne Mountain...Whoosh!

There is no center of an unbounded space.

Show me how abiogenesis works and then I'll let you know how likely extraterrestrial life is. Until we understand that, it's nothing but guesswork.

Enough buddy. There is no center — or the center is everywhere — same as there’s no center on the surface of a ball. Don’t pretend you don’t get it.

Drake equation.

Take the probability of all of the variables that allow a planet like Earth to host life, and multiply.

Unfortunately, with a definite sample size of one, there's disputes tp be had about which variables to include, and depending on these you either get millions of inhabited technological planets in our galaxy or 1>x>0, which we know not to be the case, as it happened once.

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There is 0 evidence aliens exist, we just assume a very high probability based on our limited understanding of our world and life on it

There is a possibility of other life but there is no proof. You can believe life is out there but that doesn’t mean you are sane. There is no fact of alien life cause there is no proof. It is only probability

We are yet to find inadmissible evidence that extraterrestrial life exists. Of course there are lots of planets out there, but it doesn't make it 100 percent certain that ET life exists. The true way of science concludes that there is a high chance of ET life existing, but we cannot rule out other possibilities yet.

Except a ball would have a center as a ball is a 3d space. The center would be at the core of the ball. Same with our space. Assuming the big bang is true and the universe was created out of a singularity expanding outward, then the center would be the origin of the big bang itself. We are a point in space somewhere within the expanding matter of this universe. We are not at the center or the edge of this universe

That doesn't make any sense and I believe you may be misunderstanding what was being said. According to big bang theory, matter existed as a singularity that exploded into what we see as our universe. Assuming even distribution of matter, the origin of the big bang would be our center.

That depends. Even infinite space can have a defined center if there is a finite material within that space for which we can observe distribution and find the center

That core would be in a dimension that doesn’t exist in our universe. I was giving you a simple analogy in 2D space. I’m sure you fully understand this concept and are just being argumentative. A child can understand it.

Except you are using a 2d example to represent 3d space. This is a common problem with trying to portray infinity in a way thats understandable to everyone. We, as matter, exist with a physical 3 dimension. The existence of matter allows us to determine a center as long as we can observe that matter in it's entirety. Thus is true whether or not we live within an infinite or finite space.

If space is finite, that center is defined by its edges.

If it's infinite, and assuming that the only matter within that universe came from finite number of big bangs, then its center would be defined by the distribution of matter within it.

If it's infinite, and assuming an infinite number of big bangs, then a center cannot be determined as there exists no definable edge or boundary of matter.

Going back to your ball example and why it is a bad representation of your argument, you could define a central point. First problem, the surface of a ball is finite. Ignoring that let's look at problem two. If you add any matter to the surface of that sphere, you now have a definable point in space. As it is a single point, it would become the definable center of that surface. As you add more points, the center would be defined by a point in space that would see an even distribution of points on the surface.

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>ng theory and the cosmological principles of the universe being roughly homogeneous and isotopic says that there no center of the universe.
>
>We are the center of our observable universe but there is no center of the entire universe at all.

If everywhere is a center, and nowhere is the center = the same statement.

Also the concept of an unobservable universe = pure speculation by definition.

Well, got to align those chevrons.