Diamond star thrills astronomers

Conspirator
User avatar
Posts: 1850
Joined: Sun Jun 13, 2010 2:29 pm

PostMon Sep 13, 2010 1:05 pm » by zinzana


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 carbon.

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.

news.bbc.co.uk

Conspirator
User avatar
Posts: 4805
Joined: Sat Jan 09, 2010 4:27 am

PostMon Sep 13, 2010 5:25 pm » by sockpuppet


Thanks Zinzana, awesome fine!
Skype: nnboogies
http://www.youtube.com/watch?v=ouyVS6HOFeo

Conspirator
Posts: 1644
Joined: Sun Aug 09, 2009 1:31 am

PostMon Sep 13, 2010 5:57 pm » by Heinousone


Now, just imagine if there really are secret space travel projects going on that we know nothing about and if they are able to travel to a star like that?



  • Related topics
    Replies
    Views
    Last post
Visit Disclose.tv on Facebook