In this whole galaxy, is Earth the only planet with living things living?

Answer 1

There are supposed to be about 100,000,000,000 stars in the Milky Way galaxy. Since we are working with a quadrant we’ll take 25 percent of those or about 25,000,000,000. Now that includes every star whether it is new, dying or whatever. Using what I call the Rule of Ten we can get an approximate number of stars with an Earth like planet and the number of planets with possible life.

Out of the 25,000,000,000 stars let’s figure that only 10 percent will be about the same age as our Sun. That would take the number down to 2,500,000,000. These stars would be yellow with about the same temperature and size and our star. This age would also give any debris surrounding the star to form into planets.

Of those 10 percent, or 2,500,000,000 would actually form planets. Now, we have 8.5 planets in our solar system. The .5 being Pluto, which scientists cannot decides on its status as a planet or a large ice covered rock. Most of the interstellar planets found by researchers have been determined to be the size of Jupiter and Saturn. This is just a guess going by the shift in the respective star when the planet orbits it. However, let’s use the Rule of Ten again and say that roughly 250,000,000 stars have planets the size of Earth and reduce it again by saying the ten percent of those stars have rocky type planets. So now we are down to 25,000,000 stars.

Now, the planet would have to be the right distance from its star. We are 93,000,000 miles from the Sun. That gives us just the right amount of sunlight, heat and radiation. Any closer and we’d burn, and farther away and we’d freeze. Out of those 25,000,000 ten percent would have planets in just the right orbit to sustain life. So, we now have 2,500,000 planets with a small chance.

Here comes the good stuff, lastly we have the planets where the right combination of lightening, chemicals and pure luck threw together a mix that grew, moved and became alive. Now, these would include everything to slime to bugs to intelligent creatures. So the Rule of Ten would knock the number of stars with any form of life in their system down to 250,000. If course, this would include planets like Mars whose life has come and gone.

Let’s do it one more time. Let’s say that only ten percent (25,000) of those life supporting planets have developed into multi-celled creatures, gained intelligence and became like us… for the most part. We now have 25,000 stars with planets orbiting them, supporting life and that life grew to at least post industrial revolution status.

Answer 2

So far, all we can see is what is in front of us. And that is the vastness of endless space and the 6.7 billion people on Earth. Personally though, I would be very surprised that if life on this planet has adapted to oxygen (originally a poisonous gas to lifeforms), then why can't life flourish on some far-flung planet? Religion dictates differently, but I don't listen to that.

Answer 3

No, and lets think about it for a Minute...There are billions of planets, and even billions of galaxies if not more. Surely somewhere in the universe other intelligent being exist. We might be millions or hundreds of light-years away from us, so therefore even Radio-waves can't reach. When we humans think about intelligent life we tend to think about them as being technology more advanced or as advanced as us, however whats not say, that they aren't in there CAVE man era? What's not to say that they are not a few light years away from us, but don't have radio so they nothing of our presence. Or maybe they are so advanced, that we are possibly using very antique technology, so technology is not compatible.

Answer 4

Probably not, but we don't really know. Earth is the only planet in this SOLAR SYSTEM with life, but there are many other solar systems in the galaxy. Unfortunately we don't know if there is life on any planets in other solar systems.

Answer 5

It's the only place we know of, but we haven't really been anywhere. There could be life on Mars, in the oceans of moons around Jupiter and Saturn, in the clouds of the gas giants and Venus - and that's only our one solar system. There are millions of solar systems in the galaxy.

But in terms of being smart enough to transmit radio signals, we're the closest in a 100 light year radius.

Answer 6

may remotely be other life forms out there, but too far to reach us, many light years away, the closest star system we have found that might have planets is thousands of light years away and because of the types of stars they are and the location of the planets around those stars, they are probably uninhabitable or conducive to sustain life beyond microscopic, takes a lot of elements to form life AND sustain, no walk in the park LOL

Answer 7

as far as we know...
it would be really hard to detect life outside our solar system. The only way so far is to infer it by analysing atmospheres of exoplanets...unless aliens beam radio messages straight at earth.
Some people haven't given up hope of finding life in this solar system- Europa, a moon of Jupiter, and Mars are the most likely candidates for hosting some form of life.

Answer 8

what?, do you think somone actually knows?

i would think that theres life on other planets in the universe and this galaxy but....obviously nowone can tell you because nowone has discovered another planet with life yet

Answer 9

Almost certainly not. There may even be primitive life forms elsewhere in our own Solar System, e.g. on Mars or Europa.

Answer 10

they are maybe extra terrestrial life in other planets, they found a life on mars which is that little worm of cell or something.