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.
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.
Labels: black holes, galaxies, speed of light
posted by L. Riofrio at 6:36 PM
1 Comments:
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’
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