[ExI] Gravitational Waves Detected By LIGO!

[Tomaz Kristan]

> The supermassive black hole in the center of our Galaxy will produce no
gravity waves, but 2 much much smaller neutron stars in a close orbit will.

Agree. Unless something (a small black hole, neutron star etc ..) will fall
in.

Those giant black holes, have swollen millions of black holes during past
10 billion years. Each. And there are billion of them. Many
such occurrences every year, even every day.

We do not detect those. Why?

As someone said about SETI - listening for droplets, where a Niagara falls
thunder should be!



On Sat, Feb 13, 2016 at 7:40 PM, John Clark <johnkclark at gmail.com> wrote:

> On Sat, Feb 13, 2016 at 6:50 AM, Tomaz Kristan <protokol2020 at gmail.com>
> wrote:
>
>
>> ​> ​
>> what's bothering me is also the super-massive black hole in our Galaxy,
>> five orders of magnitude closer and about five orders of magnitude as
>> massive, orbiting by many massive stars ... but no gravity waves from there.
>> ​ ​
>> That was my line of reasoning all along. If we can't gravitationally see
>> this, how we could see something much smaller, so far away?
>>
>
> ​The only thing that can make gravitational waves is an accelerating mass,
> so a black hole that is just sitting there will not produce gravitational
> waves no matter how big the hole is. Even a giant star the runs out of fuel
> and collapses into a black hole will not produce gravity waves because the
> collapse is symmetrical and the waves will cancel out. You need asymmetry
> for waves such as happens when 2 orbiting black holes merge. The supermassive black
> hole in the center of our Galaxy will produce no gravity waves, but 2 much
> much smaller neutron stars in a close orbit will.
>
>  John K Clark
>
>
>
>
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