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Do Aliens Exist?

Updated on March 17, 2016

There are billions of Galaxies in the universe. Each Galaxy has billions of stars. Many of the stars have planets orbiting around them. It is a most possible thing that many of the planets may have life on it. Many planets may have most advanced form of creatures on them, like Man on the earth. Many people think that It is possible that such advanced life forms travel in the space and some of them visit our Earth. It sounds interesting, but why they should visit our Earth when their are many other planets everywhere in the universe to visit?

What are Aliens? Do they Exist?

The simple definition of Aliens is the creatures which are not originated from our Earth. It is most possible thing that life on other planets in the universe exists. The life on other planets would be very different from that of our Earth. There may be most advanced and most complex form of life at other places. Further, many planets in the universe may have creatures with highly advanced intellect and technology.

According to Frank Drake, an American astronomer and astrophysicist who is well known for his research in extraterrestrial intelligence, there are at least 1000 civilizations in our own Galaxy, i.e. the Milky Way. He extends the number to 1 billion civilizations on the maximum side.

Remember that there are 200 billions stars in Milky Way and this number may increase to 500 billions. You can imagine how many planets would be there. There must be a large number of planets with an environment suitable to give birth to various forms of life in Milky Way. Further, our universe is very vast and contains a large number of Galaxies. We are able to see only a small fraction of the universe even through most powerful and most advanced telescopes. According to the latest estimates, there are about 500 billion Galaxies. Each Galaxy consist billions of stars and many of the stars have planets orbiting them.

So we can not claim that life exist only on our planet. It is logical to think that life exists on at least 1 Percent of the planets in the Universe. Some of the life forms on many planets must have advanced intellect and technology.

Do Aliens Visit our Earth?

Now the question arises. Do the Aliens visit our Earth? Many people think that Aliens visit our Earth. This has been a very popular subject for Hollywood movies and Science fiction writers. But there are many flaws in thinking that Aliens visit our Earth.

It is almost impossible thing for Aliens from other planetary systems to visit our Earth, even if they have developed most advanced technology to travel in the space. Here are the reasons:

1. We know, nothing can travel faster than light. We know that light travels at the speed of 300000 Kilo Meters per second. The distances between stars are very large. The closest star to our Earth is Proxima Centauri. The distance between our Sun and Proxima Centauri is 4.3 Light Years. That means the distance traveled by light in 4.3 years at the speed of 300000 Kilometers per second.

2.There are 72 stars within a radius of 17 light years from our Sun. Only 4 of these seventy two stars have planets orbiting around them. There is no sign of existence technically advanced life form on these planets. It is logical to think that technically advanced creatures use Radio Waves for communications. We have not observed existence of radio waves spread from these planets.

3. Even if there are technologically advanced creatures on the planets beyond the the closest stars, it is more difficult and time consuming for them to visit our Solar System. Obviously, they will prefer to visit nearby planets of their own planetary system, or the planetary systems of nearby stars.

4. Forget about the Aliens from other Galaxies, it is impossible for them to visit other Galaxies, even for the most advanced creatures. Remember that in the history of mankind, man is yet unable to go beyond the Moon physically. Moon is just 350000 to 400000 Kilo Meters away from us. The Light distance between Earth and Moon is just 1 to 1.3 Light Seconds. Now think about the Light Year Distances... 4.3 years, 100 years, 1000 years and even Millions of years.

5. It is ridiculous to think that Aliens visit our Earth for shelter as their own planet is in danger, or just to attack our Earth. In first case, they will take shelter on planets nearby to them. In second case, there is nothing special in Earth or human beings to choose them to attack.

Why We Still Have't Met Aliens? Video

Aliens Don't Exist Video

© 2013 Mahaveer Sanglikar


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  • yankeeintexas profile image

    yankeeintexas 4 years ago from Lubbock, Texas

    I have believed that it is possible for other civilizations to exist in in our galaxy but, no way that they could visit our world. Great hub my friend!

  • Au fait profile image

    C E Clark 4 years ago from North Texas

    One reason aliens might visit here is not to enjoy our towering human intellect but to take advantage of our natural resources -- minerals for example.

    Highly possible that extraterrestrials are far beyond our ability to even imagine their technology, in which case they might very well visit or even live here among us without our realizing it. We should not make the mistake of thinking that because our own knowledge is limited that all life is equally limited either in knowledge or physical requirements and possibilities.

    Love the photo with the fuschia aliens. Fuschia is one of my favorite colors. Wonder if aliens come in both fuschia and green? ;) Will share!

  • teaches12345 profile image

    Dianna Mendez 4 years ago

    You hear so much about life in space possibilities, many are very convincing. Then the movies, that's another story! Great presentation and thoughts to consider.

  • SilentReed profile image

    SilentReed 4 years ago from Philippines

    A book that probably started this interest is Erich von Daniken's "chariot of the gods" Certain events depicted in ancient books are being interpreted by some as Alien invasion from outer space like the "spaceship" of Ezekiel in the Bible, and the great battle in the sky observe by Arjuna in the Bhagavad-gita.

    Alien visitation is an open speculation. Like the debate about the existence of "God", both sides present very convincing arguments. Although I don't mind being abducted by aliens, just as long as it's inside a movie theater in 3D :)

  • tebo profile image

    tebo 4 years ago from New Zealand

    When you point out the number of galaxies out there, you would have to think something was going on elsewhere than just here. I guess its a bit odd to think all those stars, galaxies and planets exist, but for no reason. Interesting hub and I like the points you make about why aliens couldn't visit us.

  • rajan jolly profile image

    Rajan Singh Jolly 4 years ago from From Mumbai, presently in Jalandhar,INDIA.

    This certainly is food for thought when we are time and again bombarded with the so called visits of aliens. Whether aliens come to visit us or not is a subject of debate but it seems improbable that our planet is the only one that is inhabited, when there are billions of galaxies out there.

    Very interesting and well written.

    Voted up and shared.

  • SilentReed profile image

    SilentReed 4 years ago from Philippines

    Alien visitation is an open speculation. Like the debate about the existence of "God", both sides present very convincing arguments. A book that probably started this interest is Erich von Daniken's "chariot of the gods" Certain events depicted in ancient books are being interpreted by some as Alien invasion from outer space like the "spaceship" of Ezekiel in the Bible, and the great battle in the sky observe by Arjuna in the Bhagavad-gita.

  • SidKemp profile image

    Sid Kemp 4 years ago from Boca Raton, Florida (near Miami and Palm Beach)

    Thank you, Jainismus. Your hub is very reasonable and logical. A few thoughts to add. I believe it was Carl Sagan, who created SETI, the radiotelescope-based Search for Extraterrestrial Intelligence, who first mathematically calculated the likelihood of intelligent civilizations in the galaxy.

    You are right. If there is no way around the speed of light, there are no alien visitors. If there is faster than light travel (an idea more fantasy than even science-fiction), then there might be. Let's face it. If we had it, we'd go looking for our cousins out there, just as soon as we went searching for new lands when we developed ocean-going sailing vessels.

    I believe that our idea of alien visitors does not come from outer space, but from our own minds. UFOs and aliens are the modern version of angels, demons, and faeries. If Carl Jung is right, they are expressions of our own collective human unconscious. Now that's a territory worth exploring!

  • AliciaC profile image

    Linda Crampton 4 years ago from British Columbia, Canada

    This is an interesting hub, jainismus. As you say, the universe is so vast it seems hard to imagine that there isn't some sort of life somewhere else in the universe!

  • always exploring profile image

    Ruby Jean Fuller 4 years ago from Southern Illinois

    I have always wondered if people were living on other planets, why not? They just announced that mars had life sustainable water for vegetation. I do wonder if we are visited at times. This was an enjoyable read. Thank you..

  • Angela Blair profile image

    Angela Blair 4 years ago from Central Texas

    Great and though provoking Hub -- for a fact, though, I'm nearly sure I was married to one once! LOL! Best/Sis

  • artblack01 profile image

    artblack01 4 years ago from New Mexico

    Great and very painfully honest and painfully true hub. The romantic notion of alien contact is probably not within our lifetime and alien visitation is not within our millennium.... and think about if the first transmissions you got with a planet were the rise of an evil dictator that attempted genocide (especially one of some very strange looking and possibly unappealing in appearance style alien beings).... no matter how advanced you were you might want to wait a VERY long time before visiting them. This in constant flux of wars and murder and death.... if you were going to visit a planet like ours wouldn't you wait until you stopped seeing nasty people on the TV hating on each other and starting wars and ignoring suffering? So definitely not in our lifetime.

  • breakfastpop profile image

    breakfastpop 4 years ago

    I think one lives next door to me! Up and interesting.

  • carol7777 profile image

    carol stanley 4 years ago from Arizona

    fun to think about many movies made about this. You do make sense and great job on this subject.

  • MelChi profile image

    Melanie Chisnall 4 years ago from Cape Town, South Africa

    Very interesting article! And funny you should write about this now because I'd written this as a possible topic to write earlier this week! Personally, I don't see how there can't be other life in this huge galaxy of ours. I think we'd be kidding ourselves if we thought that we were the sole species in an entire universe filled with hundreds of thousands of other planets. True, Hollywood loves to make us believe they're on their way to attack and take over this planet, and I will admit that the thought has crossed my mind a few times over the years. I blame the movies. Signs is still one of my favourites. Thanks again for the interesting article. Was great to read about all the statistics you researched. :)

  • billybuc profile image

    Bill Holland 4 years ago from Olympia, WA

    The eternal question, one we will not answer until we are standing face to face with an alien. Interesting hub my friend.