The orbiting Chandra X-ray telescope has shown that the expansion of the Universe received a kick midway through its life, about six billion years ago. Its images of clusters of galaxies have provided astronomers with a new way to probe the history of the cosmos.
It casts new light on the unknown "dark energy" that dominates the Universe.
Using the data, astronomers estimate that dark energy makes up about 75% of the Universe, "dark matter" about 21%, and visible matter only about 4%.
http://news.bbc.co.uk/1/hi/sci/tech/3728341.stm
It casts new light on the unknown "dark energy" that dominates the Universe.
Using the data, astronomers estimate that dark energy makes up about 75% of the Universe, "dark matter" about 21%, and visible matter only about 4%.
http://news.bbc.co.uk/1/hi/sci/tech/3728341.stm
