If there are on the order of 2,000,000,000,000 planets in our galaxy alone...?

I don't know. But I guess I'd say if it is just us... seems like an awful waste of space.

I don't know what different scientists calculated to be the probability, but I heard that planets capable of supporting life are probably quite rare. Their orbits have to be very close to circular, so temperature doesn't vary to high extremes throughout the year. The planet has to orbit a single star (there are many multi-star systems), otherwise the orbit would be too eccentric. There is a also a tiny "green zone" the planet has to fall into, which relates to the star's mass and the distance the planet is to it. This is the area that will have the right temperature to contain liquid water (otherwise the water will either freeze or evaporate). Our Earth just happens to be in the exactly correct location. Considering this, I don't think it is very common for a planet to have life, and even less common to have advanced technology. Humans have only existed on this planet for a very short time. If you condensed the history of the Earth into the time frame of one year, humans have only come into existence in the last second before the new year! With all this in mind, considering the sheer magnitude of the cosmos, I think it would be very ignorant to assume that NO other planets have life, but again it probably very rare and we will probably never encounter these planets.

None are be attentive to yet with maximum of celebrity there's a extreme danger there are hundred if no longer 1000's of planet with various stages of lifestyles on them. Planets that could desire to basically have micro organism, planets with more advantageous lifestyles types some more advantageous previous us.

According to one idea (the Drake Equation), there are probably about 10 other planets with "intelligent life" on them just in our own galaxy. And about 10 or so in *every* similar galaxy.

But that's just some probability numbers. As likely as it is that there is other intelligent life in the universe, until we have actual evidence of it, it's just speculation.

Peace.

Probability starts first with possibility. If it isn't possible, then it isn't probable.

Since we really don't know how life started in the first place, it's really difficult to make an assessment of how likely life is to occur elsewhere.

Most likely. Though I think the surest sign that intelligent life exists elsewhere in the universe is that none of it has tried to contact us.

It seems likely there is life somewhere else, probably in a lot of other places. We may never know for sure. The vast distances seem quite insurmountable to my imagination.

Life like our own? Highly improbable

Life of some sort? Near certainty

It could be on other planets in our galaxy. We may just lack the equipment to notice them.

The chances are highly likely. THe question is, how many are at the same technological level that we are.