If there is a blackplanet, isn't there a whiteplanet?
155075
YES. It's called EARTH and soon, MARS.
547669
The mere thought that life ONLY exists on Earth and nowhere is ridiculous!!!! For every star you can see in the night sky, there is a distinct possibility for planets and intelligent life.....why else would they be there?
57853
Actually there is no tenth planet. Although Pluto is an official planet, others objects of about the same size, or even slightly larger won't be officially recognized as planets.\n\nAn object would need to be much larger, say the size of Neptune to become and official 10th planet. And some astronomers think that should an object may be out there.
384518
There might be intelligent life on other distant planet, but not in the White House.....
986050
I think you were watching a sci-fi show, maybe artist's conceptions of planets in other systems. We can confirm that the other planets exist by watching for gravitational anomolies but our tech isn't up to the task.
414226
Yes, there has to be.  The universe is immense with many galaxies, and many suns.  There must be a lot of similar planets out there somewhere, why should there be only Earth with life?  We might never meet any extraterrestrials, probably aren't supposed to, which could explain the vast distances.  Some other beings exist now, or were extinct eons ago, or are yet to be.  I think they are a lot like us, not made of electricity or silicon, or in only two dimensions like some sci fi.
89758
Planet X did not exist.It was a possiblity for a few years,but we now know it is not.It could not hit us anyway.When the sun eventually condenses into a tiny ball,the closest planets will be sucked into it by its gravity.So,if it was getting sucked in too,which it would not,it would not get there in time.They did recently discover a new planet however.Its name is Sedna.
586467
No I believe there is other life out there somewhere. The universe is huge so how could we be the only planet to have life?
1034104
Yes, how could it be possible that we are the only planet that is positioned currently and close enough to a star in the entire universe?  Plus on a more spiritual aspect there is scripture upon the matter... "And by the word of my power, have I created them, which is mine Only Begotten Son, who is full of grace and truth.  And worlds without number have I created; and I also created them for mine own purpose; and by the Son I created them, which is mine Only Begotten."
429749
With the nearly infinite number of stars out there, it is reasonable to expect that life has developed on another planet. However, we won't know for sure until we actually encounter that lifeform, and that may be a long way off.
18870
i guess u are asking about extra terrestials.\ni donot belive they exist.
336486
No.  \nHere is why: Although the list of known extra-solar planets is growing, to my knowledge, none have been described where there are two in the same orbit.  In terms of solar planets (ie us) although it is true that two planets in our solar system cross orbits, this is not 'sharing' the same orbit (at least in the sense of your question I think).  It seems possible enough, but has not yet been described.
969053
More than a decade after the first planets beyond our solar system were found, astronomers have discovered about 200 of these "extrasolar planets," as they're called. Using a common-sense definition of potentially habitable planets, coupled with extensive computer simulations, scientists have calculated how many potentially habitable planets might be detected around other stars by the SIM PlanetQuest mission. ("SIM" stands for Space Interferometry Mission.) \n\nThe mission, scheduled for a launch in the next decade, will target planets with specific traits in common with Earth: a similar mass and an orbit in the "habitable zone," not too close and not too far from its parent star. With this mass and location, it's believed a planet could have liquid water on its surface and an atmosphere -- conditions considered necessary for life to gain a foothold. \n\nThe science team has shown that, in a survey of the best 120 candidate stars for hosting such planets, SIM PlanetQuest would have the sensitivity to find: \n\n-- Planets smaller than Earth around six stars \n\n-- Planets smaller than twice Earth's mass around 24 stars
206523
I'd imagine there is.... the universe is way to big to assume that we are the only planet with 'civilized' life on it.\n\n& really... are we THAT civilized???   :P
118270
There are alot of objects that exist beyond Pluto. Yet, at this point none of these is really large enough to be considered a planet. Check the source link for more info.
123864
there is no planet x.\nnot planet x,but an applo asteroid is going 2 hit the earth in 2019
1178025
I really don't think so. What makes us so unique? Why couldn't some other planet have left as well?