Do you think any aliens know we are here ??

Discussion in 'Science' started by Quasar44, Feb 3, 2020.

  1. Quasar44

    Quasar44 Well-Known Member

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    Surely their are many alien races that are vastly beyond are technology ;yet , they have never officially introduced themselves to us
    Reasons I can think of:

    1) The universe is too vast
    2) They came during early Earth and left
    3) They have silently watched us
    4) We are simply too stupid and not worth their time
    5) They came during comic con and left because they thought other aliens were here lol
     
  2. skepticalmike

    skepticalmike Active Member

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    The speed of light along place a maximum limit on the speed of space travel and the distances distance separating planets where advanced civilizations could have involved could easily be 1000 light years

    or more. So, that makes space travel to a place like earth unlikely. I don't believe that aliens have ever visited earth or even know that we exist.
     
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  3. modernpaladin

    modernpaladin Well-Known Member Donor

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    What about interdimensional travel and/or wormholes?
     
  4. modernpaladin

    modernpaladin Well-Known Member Donor

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    I think its likely. However, imagine ur an alien flying over earth. Do you just land on the corner or 5th and main, step out and wave hello?

    I wouldn't.

     
    Last edited: Feb 3, 2020
  5. skepticalmike

    skepticalmike Active Member

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    No wormhole is known to exist and even if they do exist they are likely very rare and would not be a means of space travel. They would destroy any form of life. I don't know what

    interdimensional travel is. There might be parallel universes but no way to travel between them.
     
  6. modernpaladin

    modernpaladin Well-Known Member Donor

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    I don't think theres any reason to limit a potentially unfathomably advanced race of aliens to similar travel means as our own.
     
  7. Quasar44

    Quasar44 Well-Known Member

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    It could be tens of millions of yrs that alien races had a head start on us
     
    Last edited: Feb 3, 2020
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  8. tecoyah

    tecoyah Well-Known Member Past Donor

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    It is extremely likely many advanced and intelligent species exist in this Universe, it is possible that some are even aware our species exists. It is however, unlikely that such creatures would take the risk of exposing them selves to such a violent and unpredictable situation as we represent. It would also represent an unacceptable form of cultural contamination to cause such upheaval in a developing society.
     
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  9. wgabrie

    wgabrie Well-Known Member Past Donor

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    I currently believe that there is both intelligent life out there in the universe and that some of the more advanced ones are also visiting Earth for whatever reason.

    I wouldn't worry about the speed of light speed limit. There are ways to get around it if we become more advanced and if certain properties of the universe turn out to be true.
     
  10. skepticalmike

    skepticalmike Active Member

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    There is only 1 way that I know of to get around the speed of light being a limiting factor. Space can expand faster than the speed of light. Some alien civilization would have to make space

    expand faster than the speed of light and be able to use that technology to travel. This might prove to be too challenging for any alien civilization. It would require an enormous amount of energy

    and then the aliens would have to be able to control the expansion of space so they could stop at a particular location. Then, they would have to be able to return to their source and that would

    also require an enormous amount of energy plus the ability to expand space in the reverse direction in a very controlled manner. So, I think that the technological challenge would likely be too great

    for any alien civilization. If faster than light space expansion is not a viable mode of space travel, then any alien civilization would be limited by the enormous amount of energy required to produce

    a spacecraft travelling close to the speed of light and the vast distances between stars. There would be no way for an alien civilization living at even a modest distance of 1000 light years to

    know of our existence and there are a few million stars within a 1000 light year radius. What is the probability of an advanced civilization living on planet within a 1000 light year radius from earth?

    I think that it would be very low and the probability of an advanced civilization within a 50 light year radius from earth approaches zero. There are only 971 stars within a 50 light year radius

    from us - I got that figure from quora.com so I don't know if is accurate.
     
  11. wgabrie

    wgabrie Well-Known Member Past Donor

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    The problem with guessing the odds of a habitable planet being located within 1,000 lightyears from us is that we aren't there yet with the data. Although we are currently learning more and more with exoplanet discoveries. And, combined with the billions of stars in our galaxy, there is plenty of room for life to exist outside of Earth.
     
  12. wgabrie

    wgabrie Well-Known Member Past Donor

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    Oh, and I know that aliens are coming here because I personally encountered them several times in the 1990s.
     
  13. OldManOnFire

    OldManOnFire Well-Known Member

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    I suspect since various forms of life have evolved here on Earth, given the potential numbers of planets in the Universe, that various forms of life exist across the Universe.

    I suspect all of them are dealing with the same issues we have here on Earth; extremely limited to no interstellar flight capabilities.

    New physics might exist to deal with the space-time conundrum but it's nothing we know about.

    How long can an advanced species survive? Earth only has a couple hundred years of technological intelligence. Common sense says if there is no check on indigenous population growth, at some point all of the host planet resources will be exhausted. What are the chances of cataclysmic natural disasters? A purple plague? An asteroid collision? Self-Annihilation? Even if a planet has 50 civilizations over millions of years that have come and gone...perhaps little to none of their knowledge is passed along?

    I suspect within a few years someone on Earth will detect a signal/sign of an intelligent species...all it takes is greatly improved technology, time, and luck!

    Meanwhile, all of our ET kicks must come from our science fiction writers...
     
  14. One Mind

    One Mind Well-Known Member Past Donor

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    Then that means whoever flies those tic tac craft are not ETs.

    I doubt even our govt knows what or who they are . They dont seem interested in introducing themselves. Just want to show off their superior tech. And showing nuclear powers they can shut down our icbms or launch them anytime they desire. Show offs .
     
  15. Quasar44

    Quasar44 Well-Known Member

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    The Aliens are not using radio waves lol
     
  16. Quasar44

    Quasar44 Well-Known Member

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    Aliens would have to have the powers of Wormholes to break the Speed of light ( which is a fact)
    That means they can control Black Holes and STARS
    OR it means they have mastered Nanotechnology and can launch trillions of tiny little bots around
     
  17. Wonder4575

    Wonder4575 Newly Registered

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    Somewhere in the universe there would be two planets close enough to each other with civilisations advanced enough to communicate with each other and travel.

    Earth it seems is not one of those :)
     
  18. HereWeGoAgain

    HereWeGoAgain Well-Known Member

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    The highly respected journal, The Journal of the British Interplanetary Society [JBIS] published this paper. The four authors, a mix of various scientists and an engineer, argue that given the cutting edge of physics allows for the possibility of faster than light travel, there is sufficient evidence for UFOs for science to take the subject seriously. In other words, we can no longer claim they couldn't be here. And there is reason to believe they are or have been.
    https://www.researchgate.net/public..._Implications_for_Extraterrestrial_Visitation

    The introduction

    Inflation-Theory Implications for Extraerrestrial Visitation
    1. Introduction
    The ever recurring question of why Earth has seem-
    ingly not been visited by extraterrestrials (ETs) has
    received considerable discussion under the topic of
    ‘Fermi’s paradox’. The problem originated as a quip
    by Enrico Fermi to colleagues in Los Alamos over
    lunch one day in 1950. Whether one assumes the
    existence of only one other civilisation or of many
    alien civilisations in our Milky Way galaxy, and whether
    one assumes colonisation involving interstellar travel
    at near-light speed or far below, diffusion modeling
    predicts colonisation or at least visitation of all hab-
    itable planets in the galaxy on timescales of tens of
    millions of years, far less than the approximate 13 x
    109 year age of the galaxy itself. Thus the paradox:
    Where are they [1]?
    Theoretical possibilities unknown to Fermi make
    the paradox even stronger today. One can now ra-
    tionally conjecture about prospects afforded by ad-
    jacent M-brane universes [2]. Indeed, if the
    multidimensions underlying superstring and M-brane
    theory are correct, there could be inhabited universes
    separated from our own by minute, orthogonal dis-
    tances. Also, anthropic reasoning has recently been
    applied to inflation theory, arriving once again at the
    conclusion that we should find ourselves within an
    enormously larger galactic civilisation [3]. While the
    ‘We are alone’ solution to Fermi’s paradox was once
    a seemingly valid one, this answer is now incompat-
    ible with the infinite universe and random self-sam-
    pling assumption consistent with inflation theory. We
    thus find ourselves in the curious position that cur-
    rent cosmological theory predicts that we should be
    experiencing extraterrestrial visitation. At the same
    time, current physics and astrophysics suggest that
    such visitation may not be as impossible as had been
    thought.
    2. Recent Scientific Advances
    In recent astronomical discoveries, over 100
    exoplanets have been catalogued, with detection
    Inflation-Theory Implications for
    Extraterrestrial Visitation
    JBIS, Vol. 58, pp. 43-50, 2005
    J. DEARDORFF1, B. HAISCH2, B. MACCABEE3 AND H.E. PUTHOFF4

    It has recently been argued that anthropic reasoning applied to inflation theory reinforces the prediction that
    we should find ourselves part of a large, galaxy-sized civilisation, thus strengthening Fermi’s paradox concern-
    ing “Where are they?” Furthermore, superstring and M-brane theory allow for the possibility of parallel
    universes, some of which in principle could be habitable. In addition, discussion of such exotic transport
    concepts as “traversable wormholes” now appears in the rigorous physics literature. As a result, the “We are
    alone” solution to Fermi’s paradox, based on the constraints of earlier 20th century viewpoints, appears today
    to be inconsistent with new developments in our best current physics and astrophysics theories. Therefore we
    reexamine and reevaluate the present assumption that extraterrestrials or their probes are not in the vicinity of
    Earth, and argue instead that some evidence of their presence might be found in certain high-quality UFO
    reports. This study follows up on previous arguments that (1) interstellar travel for advanced civilizations is not
    a priori ruled out by physical principles and therefore may be practicable, and (2) such advanced civilisations
    may value the search for knowledge from uncontaminated species more than direct, interspecies communica-
    tion, thereby accounting for apparent covertness regarding their presence.
    Keywords: Fermi paradox, extraterrestrial hypothesis, extraterrestrial visitation, UFO phenomenon, Condon
    Report, SE
     
  19. Stuart Wolfe

    Stuart Wolfe Well-Known Member Donor

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    I've taught in the public school system for over 25 years and the longer I do, the more convinced I am that space aliens live on this planet and have kids.
     
    Last edited: Feb 4, 2020
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  20. gfm7175

    gfm7175 Well-Known Member

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    Define "alien". If "alien" is what I think you are referring to, that is purely a religious belief and has nothing whatsoever to do with science.
     
  21. Quasar44

    Quasar44 Well-Known Member

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    An organic species from another Solar System
     
  22. OldManOnFire

    OldManOnFire Well-Known Member

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    Didn't mention radio waves? But there are other things to try to identify the potential for life forms then focus our technology on those promising planets to see what can be detected? No matter the path it will be like finding a special spec of sand in all of Earth's ocean shorelines...we're not exactly sure what to look for and our technology is limited...so baby steps. Earth has a specific signature so it's just a matter of having the technology to search for similar signatures, while also knowing life forms can also exist in environments unlike Earth...again...baby steps...
     
  23. gfm7175

    gfm7175 Well-Known Member

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    Ok. Then you are speaking about a religion rather than science.
     
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  24. wgabrie

    wgabrie Well-Known Member Past Donor

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    I've heard that islanders in the Pacific saw planes and carved them into rocks and worshipped them. The planes were still real...
     
  25. gfm7175

    gfm7175 Well-Known Member

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    Okay.
     

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