Earth sized planets formed 11 billion years ago

Discussion in 'Astronomy, Exobiology, & Cosmology' started by paddoboy, Jan 27, 2015.

  1. paddoboy Valued Senior Member

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    Ancient star system reveals Earth-sized planets forming near start of universe:

    A Sun-like star with orbiting planets, dating back to the dawn of the Galaxy, has been discovered by an international team of astronomers.

    At 11.2 billion years old it is the oldest star with earth-sized planets ever found and proves that such planets have formed throughout the history of the Universe.

    The discovery, announced on 28 January (AEDT) in the Astrophysical Journal, used observations made by NASA's Kepler satellite. The scientific collaboration was led by the University of Birmingham and contributed to by the University of Sydney.

    The star, named Kepler-444, hosts five planets smaller than Earth, with sizes varying between those of Mercury and Venus.

    "We've never seen anything like this - it is such an old star and the large number of small planets make it very special," said Dr Daniel Huber from the University's School of Physics and an author on the paper.



    Read more at: http://phys.org/news/2015-01-astro-archaeological-discovery-dawn.html#jCp
     
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  3. paddoboy Valued Senior Member

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    This obviously suggests that Earth sized/type planets have been around for longer then our solar system, and the subsequent possibility, of life arising long ago?
     
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  5. dumbest man on earth Real Eyes Realize Real Lies Valued Senior Member

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    paddoboy, you begin with the words "This obviously suggests", with which you appear to be starting a statement...but you end that apparent statement with a question mark!

    So...are you making a statement...or asking a question? (Note : this is a question!!)
     
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  7. Seattle Valued Senior Member

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    It's obviously a question preceded by a suggestion.

    The interesting thing for me would be to know what it is composed of as far as the heavier metals. Is it just a gas planet?
     
  8. Seattle Valued Senior Member

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  9. paddoboy Valued Senior Member

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    Thanks Seatlle....It's called being deliberately obtuse, for whatever reason...[nudge, nudge, wink, wink]

    In answer to your question though, being earth sized, and the fact that all have short orbital periods, would suggest rocky planets.
     
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  10. paddoboy Valued Senior Member

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    Also found this from........
    http://www.universetoday.com/118510...-the-chances-for-intelligent-life-everywhere/


    The system of five known planets is very compact, and all five planets orbit the parent star in less than 10 days, or within 0:08 AU, roughly one-fifth the size of Mercury’s orbit.
     
  11. paddoboy Valued Senior Member

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    It does appear from the second link that they are inside any "habitable zone"
    But the obvious point is the formation of rocky planets only a couple of billion years after the BB.
    And taking into account the possibility of "planetary migration", we could then have a totally different scenario with regards to stipulated habitable zones..
     
  12. dumbest man on earth Real Eyes Realize Real Lies Valued Senior Member

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    There is only one sentence, Seattle.
    So...is that one sentence a "suggestion" or a "question"?

    It would be nice if paddoboy could answer for himself...without making accusations...but...it is paddoboy...so...
     
  13. paddoboy Valued Senior Member

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    And it certainly is that long suffering soul, "dumbest man on earth" playing his usual un adult like games.
    Your excuse for a question has been answered.
     
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  14. dumbest man on earth Real Eyes Realize Real Lies Valued Senior Member

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    Actually, paddoboy, if you had fully read the first link you would have read :
    "
    "When asteroseismology emerged about two decades ago we could only use it on the Sun and a few bright stars, but thanks to Kepler we can now apply the technique to literally thousands of stars. Asteroseismology allows us to precisely measure the radius of Kepler-444 and hence the sizes of its planets. For the smallest planet in the Kepler-444 system, which is slightly larger than Mercury, we measured its size with an uncertainty of only 100km," Dr Huber said.

    "It was clear early on that we had discovered something very unusual because we had five planets orbiting a very bright star - one of the brightest Kepler has observed. It is fantastic that we can use asteroseismology to date the star and determine just how old it is.

    "In the case of Kepler-444 the planets orbit their parent star in less than 10 days, at less than one-tenth the Earth's distance from the Sun. Their closeness to their host star means they are uninhabitable because of the lack of liquid water and high levels of radiation. Nevertheless, discoveries like Kepler-444 provide important clues on whether a planet that is more truly comparable to Earth may exist. "We're another step closer towards finding the astronomers' holy grail - an Earth-sized planet with a one year orbit around a star similar to our Sun." "
    the above quoted from : http://phys.org/news/2015-01-astro-archaeological-discovery-dawn.html#jCp

    A follow up question, paddoboy : What does an Earth sized planet have to do with "life" in the universe?
     
  15. dumbest man on earth Real Eyes Realize Real Lies Valued Senior Member

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    So...paddoboy, you still have not answered the question put to you.

    So...paddoboy, you still have to make accusations.

    Meh....still uatoabh!!!
     
  16. brucep Valued Senior Member

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    I would hazard the guess that seatle doesn't give a crap about your vendetta aimed at paddoboy.
     
  17. brucep Valued Senior Member

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    I'm putting the dumbest man on earth on ignore.
     
  18. paddoboy Valued Senior Member

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    I certainly fully read the link, and just as certainly ignored your obvious pranks and games as many others have expressed.

    With your question, at this time I'll give you the benefit of the doubt and accept your obtuseness......
    An Earth sized planet is most probably a rocky planet, rather than a gaseous or icy giant.
    Pretty common knowledge in actual fact.
    Although worth noting, that a rocky planet, maybe much larger than Earth sized.
    Hope that helps.
     
  19. Seattle Valued Senior Member

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    It has a question mark at the end so it's a question.

    I sense that your real issue isn't with the sentence structure but rather with the underlying subject matter (however this is actually a question given the punctuation I've chosen for the end of this sentence) ?
     
  20. dumbest man on earth Real Eyes Realize Real Lies Valued Senior Member

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    Still...no answers...
     
  21. dumbest man on earth Real Eyes Realize Real Lies Valued Senior Member

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    Seattle, I simply was trying to discern what, if any, point paddoboy was trying to introduce for discussion.

    It almost seems as if paddoboy equates "earth sized planets" with the origin of "life" in the universe...notice that I said SEEMS.

    Does not really matter though...paddoboy posts what paddoboy posts....so...
     
  22. Seattle Valued Senior Member

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    We don't have "markers" that will tell us for sure whether a planet has life or not so we have to make reasonable guesses. An Earth sized planet would mean that it is likely rocky as opposed to just gas.

    It's probably helpful to have a hard surface on the planet for life and even though it's possible, life as we generally think of it isn't compatible with a gaseous planet.

    So, an Earth sized planet, in the so called "habitable" zone would be a start don't you think?

    Rocky might allow for a magnetic field which would help to keep gamma rays out and to retain an atmosphere. It might have the materials that we think might be the raw materials for life.

    If your concern is that God did it (regarding life) then your concern isn't really with anyone's description of a planet is it?
     
  23. dumbest man on earth Real Eyes Realize Real Lies Valued Senior Member

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    Cool Beans...now what does that have to do with the subject of the OP?
     

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