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Ghodrat Tashakkori

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If we can suddenly move the Sun to a very far new position.how long does it take for the Earth to feel the abcence of the Sun?

By this question I want to know the speed of gravitational force.

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  • Dirk Gielen

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    May 30 2012: I forgot to mention: I am giving you my reaction to your title, not to your question, but hope to b e of your interest.
    Also to add:

    .. how ever I am convinced God wants us to play safe and see as humanity if we can find ways how to protect Earth from big bangs.

    I believe solving the cases in case such and such happens to Earth, the Sun, Moon and other planets, we can prevent it to harm our crucial objects. But it takes total solving at best.

    I believe to solve this we need frontier to evolute.
    Imagination is a first stap. For instance to use water to build total spaceships at will, ..sounds stupid does it, well it isn't.
    It is probably not stupid to try cause a logic is to secure space from arround Earth is to work and secure large surface arround Earth, and thus basicly plural talking to be able to use a resource present enough on Earth, as my godfull reaction is to be able to make water hard without to freeze it, etc.
    But this only being one of many potential solutions to Earth's possible situation.

    I thank you so much for putting your title of this conversation the way you did here! ' cause I understand now one of the solutions to one of the problems Earth might encounter, is to perhaps surround our solar system with a far away outward sort of 3D flame system what reacts sensible to forces towards Earth, could be rocks and fire rain etc.


    It's strange cause this topic slipped out of my major public work. Hereby I'll place reaction on it.


    Good luck.

  • Dirk Gielen

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    May 30 2012: .. Don't you worry about the Sun's distance from Earth,


    the future of Earth as an object has had its major problems I believe.
    I came across believing God has for instance founded and finds tratt to humanity as uttering where of the motivations to be considdered but now humans exist he will for instance not innitiate a big bang anymore.
    The big bang was for humans their humanitarian emotions to rule and exist.
    But it does not mean we should not out of our own sureness start working on protecting Earth from other objects to hit Earth.

  • Thomas Reddy

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    May 24 2012: We don't know the specific mechanic upon which Gravity operates, and I don't believe the speed of gravity has been directly observed. However, I believe General Relativity treats Gravity as waves that propagate at the speed of light. Particle physicists are also trying to prove the existence of gravitons, which are the particles which would do the work of gravity (like photons for electromagnetism). As a particle, it's also capped at the speed of light.

    So, if the Sun were to suddenly disapear, it would be about 8 minutes before we knew about it... 8 minutes for the light to reach us, and 8 minutes for the earth to stop traveling in an ellipse with the sun at it's center. We'd start travelling in a straight line (more or less), in exactly the direction we were travelling. The actual motion would be hard to determine, since we're moving around the sun, which is moving around the galaxy, etc...

    The real question is, how would you disappear a star? :)

  • Ghodrat Tashakkori

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    May 20 2012: We know from physics that gravity is a kind of field.We know well about electromagnetic fields.We know that they travel with the speed of light.What about gavitational fields.Are they stationay or they propagate?with what speed?If the Sun is ommited at once after what time the lack of gravity reaches us?
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    Josh S

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    May 19 2012: I dont know physics extremely well but i believe that there is no 'speed of gravity' its just always there. This means we would immediately feel the force of no gravity from the sun. However, i dont believe this would be a very big problem ( of course in comparison to others).

    Since you said moving it far away, ill focus on if the sun was moved like a light year away.
    i think our biggest problem would be the lack of light in 7/8 minutes time and how chilly it would soon get (exaggerated of course)

    But i think that we technically feel the absence of the sun instantly, of course, i am no major in physics and could easily be wrong
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    Laszlo Kereszturi 500+

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    TED AttendeeTED TranslatorAssociateLanguage Coordinator
    May 18 2012: The planets would go haywire, out of current orbits due to missing gravitational well of the Sun.
    And after 8 minutes and some seconds we'll be in dark, but who cares then.
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    edward long 100+

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    May 18 2012: i think we would experience immediate effects if the distance between the center of the Earth and the Sun increased. The least of our problems would be temperature/light. Our orbital velocity (66,000 mph) would change and that is all she wrote. Off we go into the wild colorless yonder!
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    Gerald O'brian 50+

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    May 18 2012: Wild guess : eight minutes (speed of light covering distance from where the sun used to be to the Earth). Something about space-time and the property that information never exceeds lightspeed.
    But I need to brush up on my basic physics, so I'll be checking again on this conversation for better answers.
    Interesting question, by the way.
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