earth like planet

Discussion in 'Astronomy, Exobiology, & Cosmology' started by Rita, Apr 19, 2013.

  1. Ophiolite Valued Senior Member

    Messages:
    9,232
    Rita, are you familiar with the Hitchhiker's Guide to the Galaxy? (A radio series, book(s), TV series and film). One informative extract is this:

    Space, is big. Really big. You just won't believe how vastly, hugely, mindbogglingly big it is. I mean, you may think it's a long way down the road to the chemist's, but that's just peanuts to space.....


    The nearest star is four light years away - that is to say light, travelling at about 186,000 miles per second takes four years to reach there. The moon is couple of light seconds away, the sun eight minutes. Pluto, on the outskirts of the solar system, is about thirteen light hours distant. The centre of the galaxy is around 30,000 light years distant. The nearest large galaxy is two million light years away.

    The Voyager probes, sent to investigate the outer planets in the 1970s and 1980s are on their way out of the solar system. They have been travelling for over thirty five years. Voyager 1, the most distant is now 17 light hours from the Earth. The nearest star is over 500 times further away.
     
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  3. ForrestDean Registered Senior Member

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    364
    Here's another perspective to ponder. Imagine a single grain of sand on the surface of the Earth. Imagine how many grains of sand it would take to cover the surface of the Earth.

    Some astro physicists claim that our telescopes can peer to the edge of the Universe viewing billions or even trillions of galaxies. Now imagine all those trillions of galaxies as one grain of sand.
     
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  5. leopold Valued Senior Member

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    17,455
    actually the first such "planet" was discovered by the parent stars "wobble".
    the "planet" was huge in relation to the star.
    an earth sized planet would not have been detected using this method and would not cause enough dimming of the star for a transit discovery.
    we are generally talking about "planets" that are larger than jupiter, much larger.
     
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  7. Rita Registered Member

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    210

    I can not comprehend what you said, but it looks really good to me. I don't we should tell everyone this, because people might wonder about the benefit of spending so much money on a venture that doesn't seem to have much benefit to us.
     
  8. brucep Valued Senior Member

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    4,098
    Astrophysicists have found many objects using perturbative methods. Good observation.
     
  9. Ophiolite Valued Senior Member

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    9,232
    If you can specify what was not clear I will be happy to explain it more carefully.

    I have two spearate reactions to this.

    1. Learning more about the universe and our place in it is, in my estimation, of great value to us as a species and as individuals. The Voyager spaceraft were not designed to investgate beyond the solar system - they were designed to investigate the giant planets. They did this very successfully and thereby transformed our understanding of their origin and history. It just so happens that the paths they had to take to visit those planets meant the craft would eventually leave the solar system. So, we are gaining a wealth of information about the far reaches of the solar system and the transition to interstellar space from these craft almost forty years after they were launched. That is amazing value for money.

    2. If my view is incorrect, then surely we must tell people about this as it would be wrong for their money to be spent unwisely.
     
  10. billvon Valued Senior Member

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    21,644
    There are actually a few theoretically likely possibilities already. Google "Alcubierre drive" and "Cleaver-Obousy drive."
     
  11. youreyes amorphous ocean Valued Senior Member

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    2,830
    Oh please don't be so naive, look at the rate of the progression our civilization is making in terms of achieving faster velocities for our man made craft. Already mathematical proof for faster than light (relative) has been proven as Alcubierre drive through contracting of spacetime in front of S/C and expandsion of spacetime behind of S/C. And you say we will have to wait millenia, still?
     
  12. Robittybob1 Banned Banned

    Messages:
    4,199
    Aren't they using Nerve Gas in Syria today and yesterday. I am surprised you have any faith in the ability of mankind to make such a leap in technology, faced with the problems ahead.
     
  13. CHRIS.Q Registered Senior Member

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    147
    Wow, so far away
    but, there does not necessarily have life
     
  14. orcot Valued Senior Member

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    3,488
    have you ever read on:
    Chris macckays ideas of surface life on Titan?
    Or the very real possibility that if not life their chould be a massive amount of free oxygen on Jupiters moon Europa

    View attachment 6260

    as Carl Sagan said:
    .

    It's still important that this research gets done
     
    Last edited: May 6, 2013
  15. dragon0788 Registered Member

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    11
    I dont think there any life clue but it really exciting...
     
  16. Anthony_ Registered Member

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    16
    i'd go even if there's no proof of that planet being habitable! but we got the same wall over and over; ITS TOO FAR! we can only dream about it
     
  17. Fraggle Rocker Staff Member

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    24,690
    Every generation of humans has seen the problems of that era and said with gravity and finality, "This species will not survive." Nonetheless, we have progressed from:
    • the Paleolithic Era (nomadic hunter-gatherers at the mercy of starvation during every lean year, each tribe regarding the other as hated and feared competitors for scarce resources)
    • to the Neolithic Era (farming and animal husbandry, the first food surplus, tribes joining together in villages to exploit division of labor and economies of scale)
    • to the Age of Civilization (people living in harmony and cooperation with complete strangers and creating multi-level governments to keep the peace)
    • to the Bronze Age (metal tools, the wheel, writing)
    • to the Iron Age (gigantic empires)
    • to the Industrial Age (the chemical energy in fossil fuel massively increasing the productivity of human labor, a surplus-driven economy instead of a scarcity-driven one, the 40-hour work week, universal literacy, modern medicine, infant mortality reduced from 80% to less than 1%, vacations, hobbies)
    • to the Electronic Age (instant communication with everyone everywhere, knowledge work replacing physical labor, war and poverty steadily decreasing).
    At every juncture there were people who insisted that this was all going to collapse. Just read Dickens for his pessimistic view of the Industrial Revolution!

    Don't be a little Dickens.

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  18. origin Heading towards oblivion Valued Senior Member

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    11,890
    You can't get there it is too far.
     

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