suppose you have traveld to another planet and have founda form much like ours?
545346
3 because there are 4 bases. 4^3 = 64
343599
you've got it backwards. Anyways different masses of matter and gas made the planets that's  one of my theories. so there you have it.
606332
At first, I thought, 'sure' but then I realized that we know enough about Mars and after the excitement of lift off and weightlessness, I would be bored to death traveling for months, walking around in a Mars-suit all day while there, traveling for months to get back with a few oxidized rocks... \n\nSo, just save me a ticket to the ISS and I will be happy to go and spend a few weeks touring around this ol' blue planet.
822093
Sure. A planet orbiting far enough from such a star could be habitable, but not for long. When I say not long, I mean not as long as billions of years. Red giants do not last for billions of years, but they do last for millions of years, we think. So such a civilization probably could not have arisen there naturally, but could have been started by space travelers from another star settling there.
789855
I go with the Big Bang theory and that our planet just happened to be in the right place at the right time. If our planet grew life then there is the possibility that other planets in other galaxies grew life as well. We just happened to get the right amount of heat and light from the sun.
24676
It depends on how fully terraformed Mars was and how risky the flight there would be.  Mars could conceivably be terraformed into a beautiful Earth-like world.  Given safe transportation there, heck yeah I'd consider it, especially if they allowed homesteading.
1112285
Absolutely.  There's evidence that planets with attributes similar to Earth exist.  In fact, scientists recently sighted a planet in a star system close to us that seems very similar to Earth.  Now UFO's are a bit more dubious, but then humanity has only been around for 20.000 years (maybe 50,000, depending on who you believe), while the universe has been around for at least nine billion years, and maybe up to seventeen billion (though I think that's probably stretching it a bit).  I would say there's been more than ample time for more advanced lifeforms to appear in that timeframe.
892016
How would a tourist from mars relate his experiences on earth when he gets back home
356008
At the present time, we just don't know.  If you saw pictures of aliens, what you saw were fake.  Nobody on earth has yet to produce a verifiable image, photographic, electronic or hand-drawn, of a living creature that originated elsewhere in the universe than from our home planet.  Nobody.\n\nAlso, at the present time, we suspect that there is no other planet in any nearby solar system that's host to a sentient race of beings like us.  That does not mean that some form of what we call "life" is impossible, but just think: out of the billions of living critters that now inhabit, or did in the past, our home planet, only one of those life forms evolved to the point where it (us) can even begin to think about such questions.  That by itself will tell ya we're sorta unique! ;-)\n\nIt sure would be interesting, wouldn't it?  But imagine if you will what it might be like if those alien creatures we fantasize about were an advanced race of carnivores that look upon us as another breed of cattle, fit only for eating!  Yow!  Or, how about if they were friendly, warm and fuzzy folks who just love to make nice with us - but they carry an infectious disease that there's no cure for.  Oh boy.  Or maybe, like Darth Vader, they just consider us a nusiance worthy of one blast from a super-mega cannon that blows Earth into dust?  Whoa!  Hey dude: you SURE you wanna meet aliens?  \n\nAll this is just idle speculation.  The hard fact is, even if there were creatures just like us somewhere in the universe, we are not gonna know about it, because the distances between them and us are just too great to permit interstellar travel, the hazards of such a trip are insurmountable, and no means of communication can travel fast enough for us to hear from them and be able to answer back.  Kind of a bummer, isn't it?
615320
No way, there must be many, many planets throughout the universe that are similar to our own and support life. There are probably many others that support life that is much different than we are accustomed to also.
1019611
Ummm....you are here on this earth, so at some point I guess you would have to find that out.
339938
No, as satellites and probes have been sent around the solar system, even behind the sun. There is no evidence of another planet on the other side of the sun. \n\nIn a hypothetical world where there is a planet on the other side of the sun, the gravity pull from the planet will distort the orbits of the closer planets i.e Mars and Venus. This distortion can be extrapolated by astronomists to determine the size and speed of the planet. However the existing 9 planets have all orbits accounted for.
885343
Well the sun doesn't become a red giant for a while so maybe we've made some friends by then and can go hang out near their home planet if it hasn't also been ruined.  It is likely that we will be much better at terraforming and travel so hoping over to a good canidate planet where we wouldn't be destroying life that already existed there shouldn't be too difficult a task.
990337
Yes you do.  It is a very small difference, and would depend which side of the earth you were on regards it's orbital path around the sun, however you would actually make a difference.\n\nIf this is a question that has been put to you by your physics proffessor, then the answer is in the long run....no, because....when you land, you absorbe the energy you displaced upon leaving.\n\nThis is about gravity.  Look up Kepler's Law.\n\ngood luck.
1127838
True. My exgirlfriend was an alien. She said she was from a different planet. \nBelieve her she was!
449735
What planet are you from?
605896
"Are there any other life forms on other planets?"\nProbably, we just have to find them (or they have to find us).\n\n"Is it possible that when we expire we will be born on a other planet?"\nThat is a theology question, not a science one.