Since no aliens have visited earth can we conclude interstellar travel is impossible?
Out of millions of earth like planets in our milky way galaxy alone many of them should have aliens more advanced than us but we haven't seen any of them yet. Which means none of them have developed technology to travel light years.
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answers:
say: travel is not impossible at all
in space there are black holes and rocks the size of earth that would kill you
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out2lunch4now2 say: Maybe they also developed a way to travel without being seen and, after visiting our planet invisibly, decided it would be best for the rest if no one on Earth knew about their existence.
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retired old sarge say: Prove they havent... the bible talks about angels with wings (ALIENS) and ones coming down in FIERY Cheriots (SHIPS). Even your so called GOD could have been a Alien... PROVE HE OR IT WAS NOT A ALIEN.. AND do you really think SLAVES built the pyramids all over the earth and moved stones by rolling them on wood logs and stones actually heavy enough to crush the logs...
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Manuel say: No, such a conclusion is pointless .
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Jeffrey K say: No, we can't conclude that. There are many possibilities.
Life might not have formed anywhere else.
All life might be microbes.
Aliens might not be intelligent.
Aliens might not have technology.
We might not be interesting to aliens.
Aliens might be observing us without interacting with us.
Aliens might not have discovered earth yet.
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T say: Have you visited the Post Office? I think you should download and watch the "Men in Black" movies. Did you know that many of the employees of the Post Office are actually space aliens? I should have realized this sooner, but the movies made it clearer for me.
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YKhan say: There's many things we can conclude, and that's one of the possibilities. The whole group of theories about why no aliens yet is called the "Fermi Paradox".
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John say: No, we cannot. That is flawed logic.
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The Oracle of Omigod say: Well how do you know aliens have not been here? And infinity is a big place so perhaps they haven't gotten around to the blue globe yet. They might not take a look for, say, a hundred thousand years.
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tham153 say: Several possibilities: alien equivalent to the Prime Directive keeps them away; just too darn many stars to visit, and we lie in the outskirts; civilizations collapse from pollution, overpopulation, wars, etc before they can develop interstellar travel
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Zhu say: Aliens visit us the way whalers visited Tahiti or Rarotonga - for food, water, sex. Trump is the offspring of a space Ali n & a baboon.
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roberto say: given the age of the universe,man has been galavanting on earths surface for 200k years,deciding to take baths shave the beards,put on clothes a few k years ago,on the universe time scale we been around for a few minutes on the universe 24 hr clock,life out there may have come n went in billions of other planets life cycles,they MAY,be out there still,we MAY be the last of the mohicans,we MAY be the first of our kind
separate from this controversy is FTL spacecraft & technology,,you link them in error of muddled logic.
some US senator believed in 1837,that the patent office should be closed because he believed everything that could be invented already was,
'course you know better this time ehh?
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Cowboy say: No but the distances of space are so vast that no means of space flight will ever be good enough to take us to the stars - or anyone else.
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roderick say: Alien life is defined as creatures of not of this Earth
What is life exist also on a different level then human life
Just like human life is a higher form then insect species
What if this alien life form was on a higher plane than we are they could move faster defy the laws of physics and travel throughout the universe without humans even being aware of it
If one accepts this point of view then one can truly believe what the Bible says
It identified that angels which could be said are alien to the human race have visited the Earth countless times read Genesis chapter 6
These creatures have had an influence on mankind for thousands of years
Although Bible writers use terms that they could have dinner fi with it for their time. To describe them we can also use terms to describe them in our time.
Nevertheless they are higher form of life so in that way they would be considered alien to us
That's why I personally like the Bible because it's God's word and it identifies things
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ideaquest say: If nature has a time portal, it would be very interesting.
In the past, when folks thought that the Earth was flat, travelers feared falling of the edge of the Earth. Now, that we know that it is round, there is a long way and a short way of moving between two locations.
If space is wrapped around itself, we may find a worm hole or a short cut somewhere in the fabric of space-time and new possibilities will open up.
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Paula say: Yes.
And many people have noted the logic of your argument before.
Like this guy
https://www.technologyreview.com/s/40993...
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Ronald 7 say: In the sense of Physics
Nothing is Impossible
It was once said that people would suffocated by traveling at 30 mph
Then George Stevenson built his "Rocket"
And Man would never fly !
To be sure, the Distances are cruel
But someday we will find a way
Whether Light Speed, or Cryogenic Freezing
We have come a long way in non Manned flight
New Horizons took less than a Decade to get to Pluto
Who knows what the next 1. 000 years will bring if we can find peace
And we will
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Sciencenut say: If you mean travel to the nearest stars, then no, it will not be impossible in 100-200 years or so, in my humble opinion. (Interstellar travel is certainly impossible at present.) Science fiction writer Arthur C. Clarke once said that interstellar travel is no problem, as long as you are in no particular hurry. Interstellar travel does not violate any known physical laws, so the rest is "just engineering". It looks like it is quite possible that a spacecraft powered by controlled thermonuclear fusion could achieve 20% light speed. That would be ~22 years to Alpha Centauri and ~30 years to Barnard's star, one way. Adding in a little antimatter could boost this to maybe 50% light speed or higher. At that speed, it would be 9 years to Alpha Centauri and 15 years to Barnard's star.
Source(s):
Check out the ITER: https://en.wikipedia.org/wiki/ITER
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gregory_dittman say: Aliens have to play with the same materials as there are in this solar system. As for interstellar travel, the only practical solution is robots on a one way trip. Those robots would have to survive for hundreds of thousands of years, but it's possible that it could be done.
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David say: If you were an inhabitant with super advanced intelligence on one of those planets would you want to visit or communicate with planet Earth?
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F say: We can conclude that interstellar travel is impossible with the technology we or any aliens there may be have at the present time. That is not to say , it will always be so. People in the 19 century and earlier would have said the same about flying across the Atlantic.
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ThatOneNASCARFan say: No one cares about us
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Darrell say: Choose sobriety.
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Gene say: when you look at how far we have progressed in the last 100 years, maybe if there
are "others " out there and they are even 100 years older than we are. They may
already understand and developed "time travel" Good question and great answers
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John P say: No. Just remember that the nearest star is 4.3 light-years away, and that non craft could travel at even close to the speed of light.
Thus it is quite likely that beings from far away in the universe have already set out on journeys, one of which might end up in our solar system.
Given the difficulties of interstellar travel, it is much more likely that the first contact with any other advanced life forms would be by radio.
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say: First of all we can not conclude we have not been visited!
Secondly the planet earth is on an interstellar mission and may have already competed several such missions before humans ever got on the ship.
The hard part is not the travel but the navigation! Albert claimed our biggest handicap in interstellar travel is how to know how to intercept a another system when we have no way of charting where it will be for sure. We know where it was, but not where it is at and with out knowing those two things plotting a course is impossible to do and charting a course back is twice as hard.
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jehen say: As we understand that universe today faster than light travel is not possible, therefore interstellar travel within the span of a human life is impossible except for a tiny handful of the closest stars. But the absence of Alien visits is not proof of that fact. It is more likely that technological space-faring beings are rare, and short lived. And that would simply mean that it is unlikely any two ever emerged close enough in time and space to have ever encountered one another. Humans have existed a few hundred thousand years and only had a detectable footprint in space for barely 100 years. Even if our 'technology' era lasts another 100,000 years - think about how unlikely it would be that we would overlap our 100,000 year technology arc with that of a near by star system accessible in sub-light speeds. Perhaps alien races have emerged, flourished and died our millions of years ago or will millions of years in the future, and just none nearby in our time.
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exportimportman say: Yes, and also improbably unneccessary.
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Nāga say: I don't know if aliens have visited Earth, either recently or in the past. They may or may not exist, again I don't know. Interstellar travel is not possible with human technology today, but it may be in the future, or it may have been in the past. There are at least 100 billion stars in the Milky Way alone, maybe they just haven't found us yet?
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Mountain!! say: It maybe their visits have not been made public. Also, you assume interstellar travel would be linear.
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The_Doc_Man say: Oh, no... wrong conclusion. What has really happened is that the aliens visited our planet before we were advanced enough to detect them, then they hung a sign outside the Oort cloud (ice cloud) saying "Stay away - no intelligent life here - enter at your own risk." If we ever get far enough along in our own space program, we will be able to take that sign down.
And if you believe that, I have some Louisiana bottom land I want to sell you.
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Anon say: Maybe aliens are too advanced for us.
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Optimus say: Aliens visited earth millions of years ago.
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sparrow say: It's possible that life exists, but that it doesn't have the technology to build a spaceship.
Also, the universe is a big place. It may not have come to our nick of the woods.
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Carl say: No, space is so big and life is so rare it makes sense.
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JG say: I've said repeatedly whenever people bring up aliens that aliens DO NOT EXIST. I'm not sure what interstellar travel has to do with aliens, per se.
Aliens will NEVER land on Earth, and the world's scientists are NOT going to find any out there in space.
The Bible says in Genesis 3:20 that Eve is the "mother of all living."
If extraterrestrials actually existed the Bible would clearly say so.
You have NEVER heard or read anywhere about any (tel)evangelists, or any preachers, or missionaries ever making special trips to other planets to spread the Gospel to alien life, or giving alien beings any kind of relief aid.
The Bible does mention planets other than Earth. From https://en.wikipedia.org/wiki/Biblical_astronomy#Planets:
"Except for Earth, Venus and Saturn are the only planets expressly mentioned in the Old Testament.
Isaiah 14:12 is about one Helel ben Shahar, called the King of Babylon in the text. Helel ("morning star, son of the dawn") is translated as Lucifer in the Vulgate Bible but its meaning is uncertain.[1]
Saturn is no less certainly represented by the star Kaiwan (or Chiun),[2] worshipped by the Israelites in the desert (Amos 5:26). The same word (interpreted to mean "steadfast") frequently designates, in the Babylonian inscriptions, the slowest-moving planet; while Sakkuth, the divinity associated with the star by the prophet, is an alternative appellation for Ninurta, who, as a Babylonian planet-god, was merged with Saturn. The ancient Syrians and Arabs, too, called Saturn Kaiwan, the corresponding terms in the Zoroastrian Bundahish being Kevan. The other planets are individualized in the Bible only by implication. The worship of gods connected with them is denounced, but without any manifest intention of referring to the heavenly bodies. Thus, Gad and Meni (Isaiah, 65:11) are, no doubt, the "greater and the lesser Fortune" typified throughout the East by Jupiter and Venus; Neba, the tutelary deity of Borsippa (Isaiah 46:1), shone in the sky as Mercury, and Nergal, transplanted from Assyria to Kutha (2 Kings 17:30), as Mars."
No mention of any extraterrestrials here.
I assume you're trying to make a correlation between aliens and interstellar travel, because you think alien beings could possibly expedite it with the use of advanced technology. That's NOT going to happen.
If you want to know about interstellar travel go here:
https://en.wikipedia.org/wiki/Interstellar_travel
Hope that helps.
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Bill-M say: We can conclude interstellar travel is impossible for two reasons:
1. Distance
2. Speed of light can not be exceeded.
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say: of course not. and interstellar travel is not impossible. in fact the earth and solar system itself are on an interstellar journey right now orbiting around the galactic center.
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Poseidon say: I would like to know where you get your info that there are millions of Earth like planets in the Milky Way.
You say this but in the same sentence you say we have not seen them yet. If we have not 'seen' them yet then how can you, or anyone, say there are millions of Earth like planets in the Milky Way.
It is extremely possible that there are life bearing planets in our Galaxy and some may well have intelligence and technology far superior to ours but that does not prove that they are technically advanced enough to find us let alone travel here.
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Lôn say: Yes, that's a good conclusion. The same as time travel being imposisible as no-one from the future has visited us.
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Robert say: No. That's not correct. There had been a large queue of different extraterrestrials, all wanting to visit, but they decided that the "beach-head" had become soiled.
After all who wants to visit a plant whose environment is being systematically-destroyed, with time rapidly expiring to do anything about it.
Oh, but then persisting in destroying the environment (and ourselves with it) amounts to being an excellent protection against any such "invasion" - Good job puny-humans!
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Nikki say: once we travel into the space between solar systems within this galaxy, all the germs from inside our bodies will "mutate". these organisms are then considered "extra-terrestrial" organisms.
perhaps, their properties could change, so that a movie like the "blob" is possible.
no one knows what effects "space travel" may have on humans, beside "insanity" due to cosmic radiation and due to the long periods of time it takes to get anywhere.
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adriana say: Yes they have
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john say: No aliens have visited earth? You have evidence? Evidence has been produced contrary.
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average say: Aliens are there now, you just have a hard time identifying them.
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Todd say: this is a big leap in logic, do you know how large the universe is? Life is most likely incredibly rare, even a space exploring species would most likely find very few life forms, we probably don't have many aliens near us, this is like before we invented planes and using the logic nobody in another country has made a flying machine so its impossible.
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armouror say: No I read a book about ET and the author said they are watching us they don't want us out there until we stop killing each other on our own planet
when we Grow up maybe they will talk to us
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PhotonX say:
.
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Willy say: If in they haven't visited earth(which there is no way to definitively determine) then it means the chances of interstellar travel are mathematically highly unlikely as was already expected. But the work impossible isn't quite correct.
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Anonymous say: It's hard to think that we earthlings, are on one planet, and this planet holds all the universe's living things.
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