Friday, October 29, 2010

The Farthest Galaxy

The European Southern Observatory's Very Large Telescope has confirmed that the most distant object yet found is a fully formed galaxy. UDFy-38135539, first spotted by the Hubble Space Telescope, was formed just 600 million years after Big Bang. Like our Milky Way, this galaxy consists of luminous stars surrounding a supermassive Black Hole. ESO Press Release.

How massive Black Holes could have formed so soon after the Big Bang has long been a mystery. Size of a primordial Black Hole is limited by a "horizon distance," that light could have travelled. Once it was thought that light always had the same value, and primordial Black Holes would be tiny. Discovery of a fully-formed galaxy formed soon after the Big Bang is one more clue that the speed of light was once much greater.

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1 Comments:

Blogger bazza said...

Hi, I discovered this blog by random chance.
Once I started reading I couldn't stop.
Thank you for making a difficult subject so accessible!
By the way I have blogged about Buckminster Fuller here

Bazza’s Blog ‘To Discover Ice’

8:32 PM  

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