[FoRK] short-term predictions: 2014, 2017, 2022
dmorton at bitfurnace.com
Wed Jun 20 22:53:35 PDT 2012
Thats fucking wonderful... maybe we don't need to worry about carbon
emissions at alls, since it will all be subsumed in a sol terminal phase
On Thu, Jun 21, 2012 at 1:34 AM, Stephen Williams <sdw at lig.net> wrote:
> On 6/13/12 3:57 PM, Stephen D. Williams wrote:
>>> Tons of glass produced per year: 40 million. Hmm. That's not very much.
>> What is that in carats? Oh:
>> 1.814×10^14 carats
> Diamond star thrills astronomers
> A diamond that is almost forever
> Twinkling in the sky is a diamond star of 10 billion trillion trillion
> carats, astronomers have discovered.
> The cosmic diamond is a chunk of crystallised carbon, 4,000 km across,
> some 50 light-years from the Earth in the constellation Centaurus.
> It's the compressed heart of an old star that was once bright like our Sun
> but has since faded and shrunk.
> Astronomers have decided to call the star "Lucy" after the Beatles song,
> Lucy in the Sky with Diamonds.
> Twinkle twinkle
> "You would need a jeweller's loupe the size of the Sun to grade this
> diamond," says astronomer Travis Metcalfe, of the Harvard-Smithsonian
> Center for Astrophysics, who led the team of researchers that discovered it.
> The diamond star completely outclasses the largest diamond on Earth, the
> 546-carat Golden Jubilee which was cut from a stone brought out of the
> Premier mine in South Africa.
> The huge cosmic diamond - technically known as BPM 37093 - is actually a
> crystallised white dwarf. A white dwarf is the hot core of a star, left
> over after the star uses up its nuclear fuel and dies. It is made mostly of
> For more than four decades, astronomers have thought that the interiors of
> white dwarfs crystallised, but obtaining direct evidence became possible
> only recently.
> The white dwarf is not only radiant but also rings like a gigantic gong,
> undergoing constant pulsations.
> "By measuring those pulsations, we were able to study the hidden interior
> of the white dwarf, just like seismograph measurements of earthquakes allow
> geologists to study the interior of the Earth.
> "We figured out that the carbon interior of this white dwarf has
> solidified to form the galaxy's largest diamond," says Metcalfe.
> Astronomers expect our Sun will become a white dwarf when it dies 5
> billion years from now. Some two billion years after that, the Sun's ember
> core will crystallise as well, leaving a giant diamond in the centre of the
> solar system.
> "Our Sun will become a diamond that truly is forever," says Metcalfe.
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