Is this theory right? ?

Question

If we find other suns about the same size of ours then the probability of another earth like planet within that solar system is very likely? Kind of like expect to find snakes in a tropical environment and pine trees in high altitude. Maybe our solar system is an environment that has similar characteristics to many other systems just like this one. I bet

suns of our age and size harbor a single earth like planet very often,or maybe even larger suns harbor larger earths in a cousin star system what are your thoughts on this guys?

Answer 1

high chance the theory is right..

they have found superearths that are also same distances from their suns like earth is..

meaning reasonble temperatures and warmth......for life :)

Answer 2

We divide stars into the following categories: O,B,A,F,G,K,M.  Each of these is subdivided into 10.  The Earth's sun is a G2.

Large stars such as O,B, and A  are unlikely to have living worlds.  Suns of this size have short lifetimes.  They would self destruct before any possible planet could develop advanced life.  Life require many billions of years to develop.  

Small stars such as K and M class have very long lifetimes, but they are rather weak. This means their HABITABLE ZONES, the area around a star in which a planet of the correct size can develop liquid water, is very, very Narrow.  With a narrow HZ the chances of having a planet of the correct size develop in that zone are very low.

Higher numbered F and most G class stars offer the best chances for life.  They have stars with sufficient lifetime, and reasonably wide Habitable zones.  

Other qualifications are also necessary and probably qualifications that we don't currently understand.  

I recommend a book entitled " Rare Earth" for a readable description about the subject.

Answer 3

i wouldnt go as far as to say that. it depends more on the accretion disk around the star than the star itself. the mass, density, extent, and make up of the accretion disk would determine if an earth like planet developed.

Answer 4

If there are many solar systems similar to ours and planets similarly placed; so what next?

How do you reach there, the tropical environment with snakes and pine trees in high altitudes?

Even if they are, in our galaxy, do you expect to exchange messages with the beings there? What do you know of the planets on the other side of Milkyway (beyond the Galactic Center), of which we've seen the least through our telescopes and radio telescopes?

Answer 5

To Daniel G, I do agree with most of your answer, however

:

"a hello,we are here, broadcast to deep space, was made in 1967, should now be about half way acrost our galaxy."

How is your version of our galaxy only 82 light years across?

Answer 6

I wouldn't say likely, but there is a small chance.  

You would have to find a planet that has the same atmosphere, and then just about the same distance from its sun (if it is the same size as our sun) as earth is from our sun.

When you add those two factors in, it becomes a lot less probable  

Answer 7

stars are characterised in many different ways. mass is one of those that are important for planet formation, but another that is probably even more important is metallicity - the fraction of heavy nuclei in the star. it is generally supposed that high metallicity stars are more likely to form planets, especially rocky planets. also planet formation is likely to be a somewhat random process - the final results can depend on the results of some rather low probability collision events early on in the process. age really has nothing to do with it, planet formation is expected to be over with after maybe a few million years. maybe you will get earth mass planets fairly often, but they've also got to form in the right place with the right composition etc etc. I think it's not so hugely unlikely to happen that there are no other earthlike planets in this galaxy (over 100 billion stars)... maybe it's oh nice round number... one in a million stars have an earthlike planet. so there's only like a hundred thousand earths out there :) but no one really knows, the proper thing to do is look.

Answer 8

First, I'd call it a hypothesis. Its not really a theory until it can be tested. But, based on your observations, and how we understand life to work here in our own "goldilocks" zone...and the system is alot like ours, meaning carbon based. Hmmm...why not then. You can also put your question to the test via the Drake equation. This applies to our own galaxy. Included in the link below is a fun exercise where you can plug in any numbers you want.

http://www.activemind.com/Mysterious/Top...

I guess you could ask this question another way as well. If our solar system had it to do all over again, would it do the same thing?

Answer 9

How Earth-like is Earth-like? Are we talking terrestrial (rocky) planets of similar size and mass? Because not necessarily - those are possible all over the place. However, similar stars to the sun do have one special characteristic - they last long enough to support the development of life (blue giants, for instance, blow themselves up in only a few million years, as opposed to yellow dwarfs' ten billion), but they're not so cool that the habitable zone would be so close any planets would be tidally locked (like red dwarfs).

So yeah - similar stars to ours are good for life, but you can find rocky planets all over the place. There's a nice little system about twenty light years away, a red dwarf, with two planets right in the habitable zone that have a lot of potential!

But if you're talking near-identical planets, with similar atmospheres and plants and animals, well... they'll let us know when they find one!

Answer 10

<<If we find other suns about the same size of ours then the probability of another earth like planet within that solar system is very likely?>>

I can't see any particular logical connection between the size of a star and the likely presence of an Earth-like planet.  It's like assuming, as you once found a five pound note on the pavement when you turned a corner, a similar thing will probably happen when you go round the next corner.

Answer 11

given that our sun has a planet in the 'habitable' zone,and there are millions of stars in our galaxy,and there are millions of Galaxy's

I do believe there are 'habitable' planets out there.

a hello,we are here, broadcast to deep space, was made in 1967,

should now be about half way acrost our galaxy.

if this signal reached inteligent life,and they responded,

we wouldnt know until 2049.

Answer 12

You have to realise how unique our system is. yes th Universe obvious extremely large, maybe even infinite, therefore there MAY be the chance of another system out there. God only knows.

This world cant last long enough without killing itself (us killing it by means of wars) in order to get the kind of technology to explore properly.

Answer 13

i think its very possible! and probable for that matter. actually there is a solar system just outside of ours that has a planet thats small enough to compare to an earth like planet. (most are huge gas planets) the star in that solar system is not like ours though. it was basically a star like ours but it released its energy sooner than ours making it smaller and less hot. although it doesn't seem like the perfect star to support a planet like ours but if the planet is close enough it would be just right. just like the newly discovered planet named "make make" (look it up)

this planet is actually 50% bigger than earth but scientists say it might support life. the way can tell is with the hubble space telescope. when ever the planet passes its star during orbit the hubble picks up a colors around the planet and by studying those colors the know if there is oxygen, sodium, etc. all by the colors of its atmosphere. so to make a long story longer...nobody can ever tell u ur theory about space or the universe is wrong..cuz they cannot prove its wrong. so i say anything and every thing is possible and even probable until some one proves me wrong ; )

Answer 14

Earth sized is one thing. Earth like is another. Finding an earth sized planet  only depends on the original cloud of debris being about the same density as our solar system before it was formed.

But for that planet to be anything like ours, we have to know just how likely is it to find liquid water on it. Currently belief is that our planet received its oceans do to comet.  They are mostly ice.  But are these collisions common? Did we have thousands of collisions or just a couple or really big ones?

That answer will tell us how likely it is to find life on many planets or few. That's why finding water on Mars is so important. If they find there's a lot of water hidden just below the surface, it means most planets may have water. And that good new in the search for extraterrestial life.