Anonymous
Anonymous asked in Science & MathematicsAstronomy & Space · 5 months ago

Do you believe there is life on other planets?

Putting religion aside, I know there can be controversy when it comes in to play. But do you think there is life on other planets? Any ideas / thoughts? This is for a class project. Thank you

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  • 5 months ago
    Favorite Answer

    There must be life. Our galaxy has 400 billion stars and even more planets. We can see a trillion galaxies. And we know there are more we can't see. In all that, the probability of life outside of earth is virtually a certainty.

  • 5 months ago

    there may be,in cosmological time frames,,we have been assiduously searching for a few days,the universe has been a roiling and bubbling for 13 B years,as we determine from seeing light far far distant,as it WAS,12 & some billion years ago,pretty close to 'first light',our grasp of ;'speed'

    is a big crawling on the interstates in germany,,take away the traffic, the bug sees impossible distances for him to absorb let alone,travel,

    we have not yet met other 2 leggers,,or ten leggers if some smart species out there are bugs

  • 5 months ago

    Yes

    Abscence of Proof does not mean Proof of Absence

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  • Athena
    Lv 7
    5 months ago

    Life, sure.

    Intelligent life?

    THAT is another question.

    The universe is probably full of moss and lichen.

    However, how many forms of life can read your question on THIS planet?

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  • MARK
    Lv 7
    5 months ago

    In terms of human intuition it does seem improbable that the Earth is the only planet in the entire universe with life on it. However, we must remember that while the number of planets is enormous that they may also not be conducive to life.

    Of course, life on other planets need be multicellular and intelligent. It could very well be similar to our prokaryotes.

  • 5 months ago

    Religions are not relevant.

    They deal with life on Earth only, but they will change their teaching as soon as we discover alien forms of life.

    Science has only one possible accurate answer: "We don't know".

    However, we are not totally clueless:

    Evidence pro-[alien]-life:

    - Amino acids (the "bricks" of organic compounds) have been found in comets and interplanetary dust.

    The significance of that might be either:

    1) Amino acids form naturally in comets. Life can start from them as soon as the comet crashes into a planet with "habitable" conditions

    2) Or they are the trace of a previous life around a star that exploded in a supernova and produced the interstellar cloud of dust, rocks, and comets that eventually became the Solar System.

    - The earliest known evidence of fossilized microorganisms on Earth (4.3 billion years - Nuvvuagittuq Belt - Quebec) soon after ocean formation 4.4 billion years ago, and not long after the formation of the Earth 4.54 billion years ago.

    The idea is that life develops inevitably as soon as the conditions are welcoming enough,

    As inevitably the flu virus colonizes your body as soon as it foins your welcoming noise.

    For a class project, it would be wise to mention the 3 following concepts

    - The Drake equation:

    A statistic approach of the number of civilizations in our Milky Way Galaxy.

    When written in 1961, the equation was useless since most parameters were unknown.

    Nowadays they are more and more precisely estimated.

    The current estimation is 15 million civilizations in the Milky Way, multiply or divide by 10.

    Be aware if only one parameter happened to be much smaller than expected the whole equation (and the number of civilizations) would tend toward 0

    https://en.wikipedia.org/wiki/Drake_equation

    Evidence cons:

    - The Fermi paradox:

    If the fate of any form of life is to evolve into an intelligent species and colonize their immediate then further surrounding ...

    If so, Where are they?!?

    https://en.wikipedia.org/wiki/Fermi_paradox

    - The Great Filter

    It lists the steps from lifeless compounds to galactic civilization (reproductive molecules, multi-cell life, etc.).

    Since it seems we're alone, that means at least one of those steps is almost or totally impassable. It is the Great Filter that prevents further developments.

    If the GF is behind us, Yeah! we passed it High 5 we're the lucky ones.

    If the GF is to come, we're probably doomed. No civilization before us passed it.

    https://en.wikipedia.org/wiki/Great_Filter

    • Good answer but FYI, those "amino acids" found in space are glycine, the simplest amino acid. No sign of molecules like phenylalanine or tryptophan or any of the others, which are also essential to life. Only the simplest is found in space.

  • 5 months ago

    Yes. When the Viking landers arrived on Mars in 1976, they carried out three experiments, one of which soaked the soil in radioactively labelled possible nutrients and picked up carbon dioxide produced from them. This was positive. Also, the presence of carbonyl sulphide in the upper Venusian atmosphere strongly suggests biochemical processes going on there too.

    Personally I wouldn't want to believe in a God who had made a lifeless Universe except for Earth.

  • Clive
    Lv 7
    5 months ago

    Do your own homework.

    • jackie5 months agoReport

      I’m supposed to get other people’s perspectives about the topic. LOL that is the homework dude

  • 5 months ago

    There is for sure, but which form of lives that those outer planets posses , is another topic to be discussed . Even in our earthly planet , do you really know the real purpose of having human being here on earth, in metaphysic point of view.

  • 5 months ago

    statistically there has to be. They may not be intelligent but there are for sure microorganisms out there somewhere.

    • Following the same reasoning, statistically there has to be a planet of Easter Bunnies, and another of Elvis clones. Statistics you know (wink).

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