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Thread: Close Encounter......

  1. #1
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    Close Encounter......

    On 5th March a 30m asteroid will fly past Earth at an altitude of 17,000km.

    That is 0.044 of the distance between our moon and earth.

    I'm interested to know how close a celestial object can pass without being drawn in by our gravity.

    It appears only the small asteroids ever get this close.

    I sent an email to NASA asking that same question but didn't get a reply.

    Perhaps Dr Karl may be able to answer it for me on triple J this thursday.

    BTW , for the occasional stargazers , tonight's moon is the "snowmoon"....named because february has the highest snow falls in the USA. It will also be very bright for the shutterbugs.

    Dennis.

  2. #2
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    It was almost like daylight out side at 330 am here in Adelaide.🌚

    Cheers Rod

    Sent from my GT-I9507 using AULRO mobile app

  3. #3
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    yeah Rod , but that's not unusual in Adelaide.

    by the time the sun has gone down and the twilight sets in , if there's a moon it just doesn't get dark.

    I lived there for several years and travel there at least twice a year.

  4. #4
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    Iooking forward to Dr Karl's response......providing I can listen

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    I would imagine its more to do with speed than size?
    "How long since you've visited The Good Oil?"

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  6. #6
    Roverlord off road spares is offline AT REST
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    Quote Originally Posted by ramblingboy42 View Post


    I sent an email to NASA asking that same question but didn't get a reply.

    They probably are keeping it hush hush, they probably don't want to create mass hysteria about the fact that we re about to die now wheres' my bucket list


  7. #7
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    It will be affected by the Earth's gravity, and the Earth by the asteroid's gravity too, but not so much as we will notice. The asteroid will no doubt change direction in some way that is noticeable, the Earth will have a very minor change, again, it will be unnoticeable. As others have stated, the speed of the asteroid will mean it is not "captured" by Earth's gravity (like the moon is).

    The law of gravity states that you can never escape gravity, but it is an inverse to the square of the distance, but directly proportional to the mass of the objects. Therefore if you double the distance, you quarter the gravity.

    https://en.wikipedia.org/wiki/Newton...al_gravitation

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    Another thing to consider with this near miss is the effect that other planets, our moon have on its flight path, might be closer than they think ? IF there was a hit there`s no Hollywood style fix. Might happen as there is a black president at the moment and we all know that in all earth ending disaster movies there is a black president. Solid evidence for me, might start stocking water and food now.
    Cheers Hall

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    Let me know if its going to hit. I'd like to take up smoking again.
    cheers,
    D
    1957 88 Petrol (Chumlee)
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  10. #10
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    Cool! thanks for the heads up, might read up on it later

    wonder if it will hit me? might solve a few problems!

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