On Thursday, November 7, 2019 at 6:34:24 PM UTC-6, Brent wrote:
>
> Wouldn't a small piece of a neutron star quickly explode via beta decay?
>
> Brent
>
I worked this out using the old liquid drop model. A baseball sized neutron
sphere would have a surface gravity of around 10^{14}m/s^2, as I recall,
which is enough to drag weak decay positron products back.
LC
>
> On 11/7/2019 4:24 PM, Lawrence Crowell wrote:
>
> I would say if this is something exotic it may be a piece of neutron star.
> Neutron stars are largely a neutron liquid of sorts. When they collide this
> splash may hurl pieces of neutron liquid the size of a baseball on up. This
> baseball sized piece of neutron liquid would have the mass of our moon.
> These objects may be more common that we might suppose.
>
> LC
>
> On Wednesday, November 6, 2019 at 2:44:18 AM UTC-6, John Clark wrote:
>>
>> Due to the odd orbits of recently discovered Trans-Neptunian objects
>> astronomers say that, unless it's just a very unlikely coincidence, there
>> is probably a unknown planet between 5 and 15 earth masses orbiting the sun
>> between 300 and 1000 times as distant from the sun as earth's orbit is, but
>> other than this indirect evidence optical telescopes have been unable to
>> find the slightest trace of it. A new paper suggests that the reason it's
>> so hard to find is that the gravitational mass may not be a planet at all
>> but is a Primordial Black Hole about the size of your fist, and says we
>> need to look for it with a Gamma Ray Telescope not the optical sort.
>>
>> What if Planet 9 is a Primordial Black Hole?
>> <https://arxiv.org/pdf/1909.11090.pdf>
>>
>> The Optical Gravitational Lensing Experiment has detected ultra short micro
>> lezing events caused by gravitational masses in the same range in the
>> distant Magellanic Cloud (a dwarf galaxy) that they assume were
>> caused by free floating planets not connected to any star, but perhaps
>> it was caused by something even more exotic like a Primordial Black Hole.
>>
>> Optical Gravitational Lensing Experiment
>> <https://en.wikipedia.org/wiki/Optical_Gravitational_Lensing_Experiment>
>>
>> It's probably just a boring planet but maybe not, it would be GREAT if
>> it turned out to be true, we could actually sent a robot spacecraft to
>> explore a BlacK Hole, and if it used the sun grazing "Goddard orbit" to
>> boost its speed it could get there in less than a decade.
>>
>> John K Clark
>>
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