[ExI] [Extropolis] Fusion News

[Keith Henson]

I was firmly in the "we are alone" camp and believed the bizarre light
dips of Tabby's star had to have a natural explanation.

Until the astronomers found that Tabby's star was in the middle of a
cluster of blinking stars about 1000 lightyears across.  The nearest
blinker is 511 lightyears from us.

So I ran the numbers for the shadow we see in the data.  We may be
seeing something short of a K2.

It looks like they are using a huge structure to hold power and
radiating equipment.  This way you get a maximum speed of light delay
between the computing elements.

The diameter of Tabby's star is ~1099206 km

Crossing time from center to center (the dip) is around a day.

D/24*3600 about 12.7 km/s.  In the solar system, the orbital speed for
Jupiter is 13 km/s.

M is 6.6743 × 10+11 * 1,43
G is 1.98847)×10-30  18.97845280903 10+19 v is 12700 m/s

r = GM/v**2  0.1176666 10+13, ~7.8 Au

Jupiter is 5.2 AU

The period is 2 pi r/v, 2 pi * 0.1176666 10^13/12700 m/s is 582142560 seconds or

18.46 years.  Unless I made an error, it's going to be a while before
it comes around again.  I think it would be worth calculating a bunch
of the dips this way, but it has probably been done by someone.

luminosity is 4.68, so at 1 au 6388 W/m^2, this power is divided by
7.8^2 to get 105 W/m^2,  ~0.1 GW/square km.

The area of Tabby's star is D/2 squared x pi.  22% blocked would be
208771274655 square km, 409 times the area of the earth.  As a square,
456914. km on one side.  Light speed signal delay edge to edge is
about 1.5 seconds.

The input power is 21920983838.775 GW over 1.4 million times what the
human race uses

To radiate 105 W at 65K (measured), the radiator surface will need to
be about 50 m^2 for every square meter of light input.  This looks
like it is optimized for low-temperature computation.

Because the radiators should not view each other, the whole thing
might be implemented as a deep V-shaped wedge with the sunlight going
down the middle and the radiators on the outside at right angles to
our view of the thing.

If it is aliens, they are hanging out in the computational zone rather
than the habitable zone.  They don't have FTL or they would be here
but they seem to have moved quickly.  When you ask an AI about them,
the AI thinks they have been in space for ~3000 years.  How they get
from star to star is a mystery but nanotech would certainly do the job
by the method Drexler worked out decades ago.  They seem to be
spreading out at about half the speed of light.

If that is the case, they should be here in no more than 1000 years
and it could be next week depending on how long ago they started.

I hope someone has a better explanation for the 24-blinking stars
because we don't need the competition.

Keith

On Mon, Feb 17, 2025 at 12:26 PM John Clark <johnkclark at gmail.com> wrote:
>
> On Mon, Feb 17, 2025 at 12:20 PM Stuart LaForge <avant at sollegro.com> wrote:
>
>> https://phys.org/news/2025-01-chinese-artificial-sun-fusion-power.html
>>
>> > Last month, China's Experimental Advanced Superconducting Tokamak (EAST)
>> achieved a sustained temperature of over 100 million degrees C for 1066
>> seconds. To put things into perspective, the core of the sun is about 15
>> million degrees C. This means that for almost 18 minutes a magnetically
>> confined manmade plasma was burning 6 times hotter than the sun. To
>> think that we belong to a species that in our finest moments is able to
>> achieve cosmic significance even if it is but for few seconds. Vive
>> l’Humanité!
>
>
> That is impressive! I think we should be proud of being members of a species that has managed to accomplish such a thing, it's even more impressive when you consider that our civilization (but perhaps not our species) is about to receive a HUGE boost in intelligence thanks to AI. Can you imagine what will happen after that? I can't. But it's stuff like that that makes me even more certain that ET does not exist in the observable universe because we've been unable to find the slightest trace of him (or her or it) in this galaxy nor in any other, and we certainly should have if ET existed.
>
> I just finished reading a book titled "If the universe is teeming with aliens, where is everybody? 75 solutions to the Fermi paradox" by Stephen Webb, he agrees with me that 74 of the "solutions" were not at all convincing, but the 75th was, we are alone.
>
> John K Clark
>
>
>
>
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