NASA Explorer sez:
This cosmological simulation follows the development of a single disk galaxy over about 13.5 billion years, from shortly after the Big Bang to the present time. Colors indicate old stars (red), young stars (white and bright blue) and the distribution of gas density (pale blue); the view is 300,000 light-years across. The simulation ran on the Pleiades supercomputer at NASA’s Ames Research Center in Moffett Field, Calif., and required about 1 million CPU hours. It assumes a universe dominated by dark energy and dark matter.
When ‘New Scientist’ magazine asked “Brief History of Time” author Stephen Hawking what he thinks about most, the Cambridge University professor renowned for unraveling some of the most complex questions in modern physics answered: “Women. They are a complete mystery.”
Thanks Spaghetti Hoop