TED Conversations

I. Jagatheesan Pillai

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Can every third planet revolving round it's start in every galaxy have life?

It's not necessary at all that the spacing between the planets and the star in every galaxy is the same as in our Solar System. But just for a moment, let's assume that there is one such galaxy in which there is a star with planets that have spacing between them and the star close to the spacings in our Solar System. Could the thrid planet in such system can have life? May be because our Earth, due to it's position (3rd) gets the right amount of Sun's radiation and because of that Earth has life!

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  • Mar 24 2012: When I was a boy there was a show on t.v called Mr Wizard and it was my first exposure to science . On one show ,he talks about this very question.It made such a impression on me that sixty plus years later I still remember the show ,on his black board he wrote the number one hundred million and explained that that was the number of solar systems just in our galaxy ,then he went on to say that if half of those solar systems had stars the same size and age as our star and if half of those had planets in the same position as earth and if half of those had the ingredients that came together to create life as we know it,and if half of those created life as we know it, there would be more than seven million planets just in our solar system.Now that might be a little hard to imagine but if it was just one percent of seven million, it would still be seventy thousand planets in just our galaxy that could have life as we know it now think of all the galaxies in the universe and that is only the ones with life as we know it
  • Mar 23 2012: It depends not only only on the position of the planet, but also the kind of star and the size of the planet, but yeah you're kind of in the right track... that is actually how kepler is scanning the universe looking for "earth like" planets!
  • Apr 13 2012: are you presuming that life of any kind would need the formula that created us? lets say that life that was created here stopped at the shore and continued to evolve under water would that diminish the fact that life existed here? and what force pushed life to expand from the sea did something happen to that environment over eons that made life seek to move onto shore?
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    Mar 25 2012: no becuase some stars are much bigger and hotter than our own sun so, for some galxies it would be a near impossiblity without the right conditions. If the sun was much bigger and hotter we wouldnt be here..
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    Mar 25 2012: The idea that life can spontaneously appear from dead atoms is an extremely long shot. We have been trying for decades to get this to work with masses of intelligent input without success. Why do we think it should happen by chance, & why only once ?
    Add to this the very special conditions on earth essential to sustain this life & the odds against skyrocket.
    http://www.gotquestions.org/anthropic-principle.html

    :-)
  • Mar 24 2012: Some of the not-so cruel people of Earth, thanks for putting up your view here!
  • Mar 24 2012: Just few thoughts:
    >> Forces of Nature / Forces cause Nature !!?
    “Force is the external agency applied on a body to change its state
    of rest and motion”.
    >> I assume gravitational force as one important force of existence of life in earth,.
    F = [GMm] / R^2
    where F=gravitational force, G = gravitational constant, M=Mass of body A(Sun), m(mass of body B(Earth which rotates the sun also thru gravitational force), R=radius between A(Sun) and B(Earth)
    >> So the distance between objects , mass makes the force which favors life.. Since this force is experienced by Earth with respect to Sun, life exist, If any other object has similar experiences they have life too..
    >>> Probability is high and its there =) Multiple galaxie --> Multi Universe, parallel universe are the concepts we perceive.. from electrons revolving around nucleus to galaxies revolving with respect to the center of universe/black hole. if there exist favorable M,m,R then life exist =) perhaps as third planet or any number =) Also the concept of universe expanding gives rise to new existences also ends such existence.. > wat ever the truth is, exploring these stuffs is fun
    > Source: I studied this equation in my 11th grade n wondered, OMG,You are damn brilliant , what a perfect planing n timing =)
    >> Force makes Energy,. Energy is everything which Creates Everything also Nothing =)
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    Mar 24 2012: The planet's ability to sustain life is all relative to the distance from a star and the size of the said planet coupled with the size, radiation, temperature, and type of star if i remember correctly. So the position in the line of planets of a solar system could have an impact in the ability to sustain life but it would not be the first variable i would look for in the quest to find life in space. If there was a solar system with very similar characteristics as ours it would be very probably that we could find life there, but that being said the formation of solar system and galaxies are like random number generators giving you a random outcome for every solar system in which there are millions a single galaxy so find that one solar system with the same make up as ours is difficult at best.
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    Mar 23 2012: Possible and eventually we will find earth like planets,whether they match our earth type is another story.Life has on earth shown that it can adapt to some very inhospitable environments and latest studies has shown that meteorites have lefthand amino acids on them and some of them were dated to before the earth was formed.