Do planets with Earth-like atmospheres exist in the universe?

What a silly question! No one can answer intelligently without more information. Given statistics, it seems probable, but until we have more and better tools to discover and examine planets in more detail, no one can know for sure.

After all the years this question has been asked over and over again, I believe that instead we should ask “What are the chances there are NO other planets in the universe that may contain life or what we consider life bearing qualities”.

We seem to always presume life has to be similar to ours, anthropomorphic. No body ever considers that some where in our universe something may have ocurred where the only population is mechanical, or energy, or microbial. Could there really be no other life in the universe?

That would only signify that theologically our creator is very limited (in which case there is no explanation for it, as per the thological process), if we go with the Big Bang, then there is no reason for life anywhere in the universe, since the massive heat does not leave place for any type of life to evolute on the smoldering masses that are later formed into planets. So where does the water come from? Where does vegetation come from. if at that point there is nothing in space, how can life develop from sterility?

But in reality, I do believe there are massive quantities of planets that are similar to Earth in complexity and teeming with life. What I don’t believe is that we are ever going to find more than two or three in our immediate vicinity, and we will never get to visit them in our present lifetimes.

The universe is so big that is logically possible that another planet like Earth will exist.
When not so far many astronomer doubt about exoplanets and there are many !
Oh my Tarzan English!
Es realmente posible la existencia de planetas similares al nuestro en nuestra propia Via Láctea o en cualquiera de los millones de galaxías que nos rodean. Somos muy pretenciosos en suponernos los únicos habitantes inteligentes dentro de esa inmensidad que recién estamos empezando a conocer. Tanta maravilla para los habitantes de un minúsculo grano de polvo en esa inmensidad???

Of course it is possible, even very likely. The Vatican even accepts alien life as a possibility. The question has always been contact- could we or could they? Again sure, it’s possible, according to some already happened.

Sure, water can exist as bodies of water on other planets. There is certainly no reason to preclude that water not be on other planets.

Absolutely. But as everybody on this planet is unique, right down to his/her fingerprints, I suspect every planet and every planetary system is unique. So I don’t expect we will see a clone of the earth. But a planet orbiting within the habitable zone of its star with an oxygen/nitrogen atmosphere and liquid water ocean? - Sure. With our extremely primitive instruments (relatively speaking) we have already grasped over 300 extra-solar planets. That’s just our backyard. How many more are just below the threshold of our current instrumentation has to be left up to our imagination. But I certainly get the impression that planet formation is not a fluke, but common. And with statistics like that, there has to be one… probably many. But until the planet-finder missions, its still a guess.

Let’s assume that there are planets that support life. By the time that information gets to us (c= constant), it’s useless. Ergo, .

Given that the known universe has the same elements distributed throughout it, there would be no good reason for planets with oceans not to be distributed throughtout that same universe. The number may not be able to be calculated with any degree of certainty, but some of the recent evidence from Mars indicates there may have been liquid water in quantities large enough to be called oceans which then would have had some atmosphere. The likelihood of having a like atmosphere with 21% O2/78% N2 would be much, much smaller but statistically there are probably some planets with a similar composition, given the size of the universe. I believe Carl Sagan has been out exploring this notion for several years in his new place in the universe.

Dreams & speculation … under the Tech Brief’s banner … I would expect a bit more earthly focus. I suggest we abandon this meaningless babble and set our sights on some real technical issues deserving of professional consideration. Or do I sense an underlying NASA directive to stir the interplanetary pot in anticipation of finding a new cellestial project to justify continued funding. We certainly relish the technical gains our world has enjoyed as a result of an intensive focus on space travel, however it’s time to concentrate on real, documented terrestrial applications.

It seems statistically impossible for “Earth-like” planets NOT to exist in the universe. Given the number of stars in the galaxy and the number of galaxies in the universe combined with the limited evidence of extrasolar planets around the few stars studied thus far, it seems incredulous to believe there are no other rocky planets existing in the “Goldilocks”, liquid-water region of some star somewhere - most likely within our own galaxy.

Now whether life, as we know it, exists on that wet, rocky planet is much more debatable. The existence of intelligent life is orders of magnitude less likely. However, given the brief amount of time we have existed on this planet and how self destructive we seem to be, perhaps “intelligent” life doesn’t exist very long in the universe.

I voted no, but the existance of something the same size and distance from a star is most likely to happen, but…. Having a chemical makeup that would produce something like we can live with openly is most likely remote. The reason being that matter from outter space coming in contact with the planet being like what is on earth is most likely remote. A pick up truck and a Rolls Royce both have 4 tires on the road but are not the same thing.

The fact that we would consider a question like this is a bit strange since we are headed on a destruction course if all remains the same as it is now, no matter how advanced we think we can get.

Is there any basis for why this would be releavant to anybody on Earth? There are no planets that can sustain life as we know it (OK no other country on earth either) close enough to Earth such that the question is of any consequence - but a good 3rd grade question all the same.
If IT has no potential impact on my life, and I have no potential impact on IT - why should I consider IT of any consequence?

I also voted no.

The exact question was “Do planets with Earth-like atmospheres exist in the universe?” In scientific harmony with the latest facts as we know them TODAY, there is no proof that life is anywhere else other than Earth. It takes life to formulate an atmosphere anything like Earth’s. Since no life has been detected elsewhere (intellegent or otherwise), the unpopular answer MUST be “no” because oxygen-rich atmospheres (like Earth’s) are the result of biologic production.

I am compelled to agree with others here who are disappointed with the question. It was poorly framed and needlessly fraught with inference, whatever the choice. It has the same hollow thud to it like last week’s false-choice question on Global Warming®. Whoever it is that’s asking these inane questions, why don’t you also post your name and picture alongside the question so we can start making fun of you more directly?

The Big-Bang theory supports the claim that the universe was created from a single source and thus it is likely that many of the resultant pieces planets and aplanets (stars) have similar compositions. It is also statistically likely that other such planets, with similar original composition to that of earth, were deployed at about the same “energy relative distance” from their nearest star.

Energy relative distance = amount of energy received per unit surface per unit time.

“Billions upon billions of stars in the universe…” - Carl Sagan

The odds are in favor and chaos theory would prevail that there would be a planet elsewhere suitable to supporting life. As Bill earlier mentioned that a pickup and Rolls Royce have 4-tires but are not alike, both support life - the driver and passengers. There you have it.

Considering the number of bodies in the universe, and the large band around a sun that could support at least partial liquid oceans it seems likely that it could be true. But an atmosphere could develop into thousands of variations, none of them Earth like. One thing is for sure, it never hurts to hope! We should never stop asking the question, or give up the quest. Searching, asking, exploring and expanding makes us what we are.

Absolutely! Does a bear go in the woods? There’s probably thousands if not millions. Logic and knowledge of how the universe works mandates it.

I think we are rather conceited to think we might be the only life in this universe. Even on our own planet we have found life can exist in the most extreme environments. Now if you were ask if intelligent life existed elsewhere in the universe I would have to say I hope so as we certainly are not the shining example of how to live intelligently with each other much less our own planet.

I believe it was Isaac Azimov that said that either life is unique here on Earth or common throughout the Universe. We are finding that planets are common and the ingredients that are common here (water, carbon, oxygen, nitrogen, iron, etc.) are common elsewhere. Since the building blocks of life are common, it seems likely that life will be also. Even if it occurs around only one out of a million or billion stars, there will still be many.

Discovery of life, past or present, on Mars or Enceladus or Europa, will tell us how similar or dissimilar to expect to find it elsewhere. However, discovery of or communication with life beyond the Solar System will require major technological break-thrus that can’t be predicted any time soon.

With millions of sun like stars and showing evidence of planets, the probability of earth like planets is very high. Bill

Are there earth-like planets with oceans elsewhere? Most likely; there is no reason to doubt the physics of star and planet formation apply everywhere, so the probability is good other worlds similar to earth exist. It’s just funny that everybody assumed the question asked concerned life even though that was never mentioned. There is no reason yet to make the blanket assumption that oceans equals life and complicate the issue.

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